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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
I'm looking for some screws for use in production work.
*Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. |
#2
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 15:37:07 +0800, Techman
wrote: https://dl.dropboxusercontent.com/u/...crew%20(1).JPG Filister head self tapping screws Not "sheet metal screws" Gunner |
#3
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 5:19 PM, Gunner Asch wrote:
On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: https://dl.dropboxusercontent.com/u/...crew%20(1).JPG Filister head self tapping screws Not "sheet metal screws" Gunner Thanks but I'm not sure they are what I'm looking for. I googled "filister head...." and it only seems to point to screws with the common coarse / sharp self tapping thread. I think the filister bit refers to the bulging pan head style. |
#4
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 3:37 PM, Techman wrote:
I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif |
#5
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
Techman fired this volley in
: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd |
#6
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real"threads?
On Thu, 25 Jun 2015 19:42:25 +0800
Techman wrote: On 25-Jun-15 3:37 PM, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif This Fastnal document may help: http://www.fastenal.com/content/docu...renceGuide.pdf Go to page 59 and look over the "Types of Screw Points". The "Tri-lobular" point may work for your needs too... -- Leon Fisk Grand Rapids MI/Zone 5b Remove no.spam for email |
#7
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 15:37:07 +0800, Techman
wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. Google on "thread cutting screws". Even Amazon sells them :-) -- cheers, John B. |
#8
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 19:39:54 +0800, Techman
wrote: On 25-Jun-15 5:19 PM, Gunner Asch wrote: On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: https://dl.dropboxusercontent.com/u/...crew%20(1).JPG Filister head self tapping screws Not "sheet metal screws" Gunner Thanks but I'm not sure they are what I'm looking for. I googled "filister head...." and it only seems to point to screws with the common coarse / sharp self tapping thread. I think the filister bit refers to the bulging pan head style. I was wrong...flipped my mouth off without thinking..sorry http://thecraftsmanblog.com/wp-conte...-Head-Type.png https://typhoonicus.files.wordpress....5/01/heads.jpg "Countersunk" head. The "Self Taping Screw/bolt" though is correct. Also known as a "self taping machine screw" Also "Thread Cutting Screws" http://www.americanfastener.com/thread-cutting-screws/ For metric..... http://www.fordfasteners.com/product..._oMaAtPN8P8HAQ http://www.mrmetric.com/metric-faste...-screw-metals/ http://www.eaglefastener.net/metric-...ic-screws.html https://www.fastenersclearinghouse.com/fch/main.nsf/fSearch?OpenForm&Start=1&type=R&self-tapping-thread-cutting-screws&size=M2&Cat1=PRM7DED642D2914;&Cat2=FL3961BC E05611; etc etc etc Sorry about my "screw up" (Grin) Gunner |
#9
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 19:42:25 +0800, Techman
wrote: On 25-Jun-15 3:37 PM, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png "Thread forming machine screw" And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif Thread cutting machine screw..or self tapping machine screw If it has the "cut" in the tip..its a self tapping or self cutting fastener. If it is triangular..its a thread forming screw. The thread forming screws take a fair amount of pressure to form the threads and are generally used only in softer materials such as aluminum. Try using them in steel..and you will be drilling out a fair number of them, UNLESS you drill a bigger pilot hole before installing them. Though to be fair....they do give better engagement IF the proper pilot hole has been drilled...but they are still generally..generally used in softer materials and will often have a coarser thread pitch as well. Gunner |
#10
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
"Techman" wrote in message
... I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. ------------------------------------------------------------------------------------------------------------------------------------------------ Did a search for images of self tapping screws. Scrolled through the images to find one like yours. The image description called them tread cutting screws. http://www.fastenersuperstore.com/ca...ampaign=Screws http://www.grainger.com/category/thr...ecatalog/N-8nc Robert |
#11
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 8:30 PM, Gunner Asch wrote:
On Thu, 25 Jun 2015 19:39:54 +0800, Techman wrote: On 25-Jun-15 5:19 PM, Gunner Asch wrote: On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: https://dl.dropboxusercontent.com/u/...crew%20(1).JPG Filister head self tapping screws Not "sheet metal screws" Gunner Thanks but I'm not sure they are what I'm looking for. I googled "filister head...." and it only seems to point to screws with the common coarse / sharp self tapping thread. I think the filister bit refers to the bulging pan head style. I was wrong...flipped my mouth off without thinking..sorry http://thecraftsmanblog.com/wp-conte...-Head-Type.png https://typhoonicus.files.wordpress....5/01/heads.jpg "Countersunk" head. The "Self Taping Screw/bolt" though is correct. Also known as a "self taping machine screw" Also "Thread Cutting Screws" http://www.americanfastener.com/thread-cutting-screws/ For metric..... http://www.fordfasteners.com/product..._oMaAtPN8P8HAQ http://www.mrmetric.com/metric-faste...-screw-metals/ http://www.eaglefastener.net/metric-...ic-screws.html https://www.fastenersclearinghouse.com/fch/main.nsf/fSearch?OpenForm&Start=1&type=R&self-tapping-thread-cutting-screws&size=M2&Cat1=PRM7DED642D2914;&Cat2=FL3961BC E05611; etc etc etc Sorry about my "screw up" (Grin) Gunner Yep they're the ones. Cheers. |
#12
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote:
Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. I've found out today I can get them via RS Components. |
#13
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 8:04 PM, Leon Fisk wrote:
On Thu, 25 Jun 2015 19:42:25 +0800 Techman wrote: On 25-Jun-15 3:37 PM, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif This Fastnal document may help: http://www.fastenal.com/content/docu...renceGuide.pdf Go to page 59 and look over the "Types of Screw Points". The "Tri-lobular" point may work for your needs too... Yep - thats them. Thanks. |
#14
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 8:36 PM, Gunner Asch wrote:
On Thu, 25 Jun 2015 19:42:25 +0800, Techman wrote: On 25-Jun-15 3:37 PM, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png "Thread forming machine screw" And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif Thread cutting machine screw..or self tapping machine screw If it has the "cut" in the tip..its a self tapping or self cutting fastener. If it is triangular..its a thread forming screw. The thread forming screws take a fair amount of pressure to form the threads and are generally used only in softer materials such as aluminum. Try using them in steel..and you will be drilling out a fair number of them, UNLESS you drill a bigger pilot hole before installing them. Though to be fair....they do give better engagement IF the proper pilot hole has been drilled...but they are still generally..generally used in softer materials and will often have a coarser thread pitch as well. Gunner Yep, looks like holes tapping hole size is important. I guess going on the large side might help too. http://au.rs-online.com/web/p/self-tapping-self-drilling-thread-forming-screws/4831252/?origin=PSF_432017|alt |
#15
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 8:17 PM, John B. wrote:
On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. Google on "thread cutting screws". Even Amazon sells them :-) -- cheers, John B. Thanks John |
#16
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 25-Jun-15 8:37 PM, Robert wrote:
"Techman" wrote in message ... I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. ------------------------------------------------------------------------------------------------------------------------------------------------ Did a search for images of self tapping screws. Scrolled through the images to find one like yours. The image description called them tread cutting screws. http://www.fastenersuperstore.com/ca...ampaign=Screws http://www.grainger.com/category/thr...ecatalog/N-8nc Robert cheers Robert, I've found a source. |
#17
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 15:37:07 +0800, Techman
wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. They are called thread forming screws. |
#18
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thursday, June 25, 2015 at 12:26:59 PM UTC-4, Clare wrote:
On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. They are called thread forming screws. On jobsites, I've just heard them called tappets. |
#19
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
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#20
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
You can buy drill/tap combos from MSC. It's a drill with thread cutting about 1/2" up from the bottom. Or maybe they are taps with a drill on the end.
You have to be quick off the drill trigger when the drill breaks through. |
#22
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What are these self tapping screws called that form "real" threads?
On 26-Jun-15 6:01 AM, Dave, I can't do that wrote:
You can buy drill/tap combos from MSC. It's a drill with thread cutting about 1/2" up from the bottom. Or maybe they are taps with a drill on the end. You have to be quick off the drill trigger when the drill breaks through. Thanks, yeah I've seen those. Unfortunately they would be used by all the general techs so I think they'd break quite a few of those! |
#23
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On 26-Jun-15 6:15 AM, wrote:
On Thu, 25 Jun 2015 13:50:45 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 12:05:20 -0700 (PDT), wrote: On Thursday, June 25, 2015 at 12:26:59 PM UTC-4, Clare wrote: On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. They are called thread forming screws. On jobsites, I've just heard them called tappets. Must be one of those regional things...never heard that term used for anything other than engines More likely Tappits. - but PK Tappits are used in sheet metal 0 they are NOT thread forming screws. Must be regional, in Oz, Tappits are plastic plugs with a nail in them that are used for hanging pictures or affixing to brick or concrete walls. |
#24
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 19:42:25 +0800, Techman
wrote: On 25-Jun-15 3:37 PM, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png Yeah, I've seen those and wondered what they were called. And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif Yup, that sure looks like the type you wanted. I've been using Type 17 self-tapping deck screws in the recent past. -- Find out what people will submit to, and you have found out the exact amount of injustice and wrong which will be imposed on them. --Frederick Douglass |
#25
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 21:16:30 +0800, Techman
wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. -- Find out what people will submit to, and you have found out the exact amount of injustice and wrong which will be imposed on them. --Frederick Douglass |
#26
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques
wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Been there, done that more than once. Gunner |
#27
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What are these self tapping screws called that form "real" threads?
On Fri, 26 Jun 2015 00:34:23 -0700, Gunner Asch
wrote: On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Aw, darn. You ruined all the drama and horror of manual labor for him. evil grinne -- Find out what people will submit to, and you have found out the exact amount of injustice and wrong which will be imposed on them. --Frederick Douglass |
#28
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What are these self tapping screws called that form "real" threads?
On Fri, 26 Jun 2015 13:06:28 +0800, Techman
wrote: On 26-Jun-15 6:15 AM, wrote: On Thu, 25 Jun 2015 13:50:45 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 12:05:20 -0700 (PDT), wrote: On Thursday, June 25, 2015 at 12:26:59 PM UTC-4, Clare wrote: On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. They are called thread forming screws. On jobsites, I've just heard them called tappets. Must be one of those regional things...never heard that term used for anything other than engines More likely Tappits. - but PK Tappits are used in sheet metal 0 they are NOT thread forming screws. Must be regional, in Oz, Tappits are plastic plugs with a nail in them that are used for hanging pictures or affixing to brick or concrete walls. Note - I qualified my statement with the brand - PK Tappits is a registered trademark. |
#29
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What are these self tapping screws called that form "real" threads?
On Thu, 25 Jun 2015 22:12:42 -0700, Larry Jaques
wrote: On Thu, 25 Jun 2015 19:42:25 +0800, Techman wrote: On 25-Jun-15 3:37 PM, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. I'm getting closer. Some seem to be called Taptite, http://www.shakeproof.com/images/products/taptite/taptite_160px_wide.png Yeah, I've seen those and wondered what they were called. Those taptites are thread forming scres. And others "Type 23" http://www.boltproducts.com/images/thread%20cutting%20-%20type%2023.gif Those type23 scres are thread cutting screws. Yup, that sure looks like the type you wanted. I've been using Type 17 self-tapping deck screws in the recent past. |
#30
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What are these self tapping screws called that form "real" threads?
On Fri, 26 Jun 2015 00:34:23 -0700, Gunner Asch
wrote: On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Been there, done that more than once. Gunner But they pretty well have to be grade 8 or harder unless you are using them in anealed aluminum or leaded steel-------- |
#31
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What are these self tapping screws called that form "real" threads?
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#32
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What are these self tapping screws called that form "real" threads?
On Fri, 26 Jun 2015 16:01:08 -0700, Gunner Asch
wrote: On Fri, 26 Jun 2015 13:24:03 -0400, wrote: On Fri, 26 Jun 2015 00:34:23 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Been there, done that more than once. Gunner But they pretty well have to be grade 8 or harder unless you are using them in anealed aluminum or leaded steel-------- Or thin mild steel. Ive used them to secure cover panels on various electrical cabinets, none of which were thicker than 1/4"...and anything over 1/8"...you best be having a really healthy driver to get em in. Ive driven them with a 1/2" Milwaukee "hole shooter" well enough..with a good snug properly made phillips bit. Gunner The ones made with the dremel??? Must be pretty decent quality fasteners you started with - not the cheap Chinese crap so often passed off as fasteners in big box hardware stores. |
#33
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What are these self tapping screws called that form "real" threads?
On Fri, 26 Jun 2015 21:20:45 -0400, wrote:
On Fri, 26 Jun 2015 16:01:08 -0700, Gunner Asch wrote: On Fri, 26 Jun 2015 13:24:03 -0400, wrote: On Fri, 26 Jun 2015 00:34:23 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Been there, done that more than once. Gunner But they pretty well have to be grade 8 or harder unless you are using them in anealed aluminum or leaded steel-------- Or thin mild steel. Ive used them to secure cover panels on various electrical cabinets, none of which were thicker than 1/4"...and anything over 1/8"...you best be having a really healthy driver to get em in. Ive driven them with a 1/2" Milwaukee "hole shooter" well enough..with a good snug properly made phillips bit. Gunner The ones made with the dremel??? Must be pretty decent quality fasteners you started with - not the cheap Chinese crap so often passed off as fasteners in big box hardware stores. I try to avoid buying much Chicom fasteners...though its getting damned hard to find any quality fasteners these days. It should be noted though..that the Chicoms are about where the Japs used to be in fastener making. Not half bad, unless you are buying second quality.."B" grade stuff. Gunner |
#34
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Fri, 26 Jun 2015 20:25:34 -0700, Gunner Asch
wrote: On Fri, 26 Jun 2015 21:20:45 -0400, wrote: On Fri, 26 Jun 2015 16:01:08 -0700, Gunner Asch wrote: On Fri, 26 Jun 2015 13:24:03 -0400, wrote: On Fri, 26 Jun 2015 00:34:23 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Been there, done that more than once. Gunner But they pretty well have to be grade 8 or harder unless you are using them in anealed aluminum or leaded steel-------- Or thin mild steel. Ive used them to secure cover panels on various electrical cabinets, none of which were thicker than 1/4"...and anything over 1/8"...you best be having a really healthy driver to get em in. Ive driven them with a 1/2" Milwaukee "hole shooter" well enough..with a good snug properly made phillips bit. Gunner The ones made with the dremel??? Must be pretty decent quality fasteners you started with - not the cheap Chinese crap so often passed off as fasteners in big box hardware stores. I try to avoid buying much Chicom fasteners...though its getting damned hard to find any quality fasteners these days. It should be noted though..that the Chicoms are about where the Japs used to be in fastener making. Not half bad, unless you are buying second quality.."B" grade stuff. Gunner I've had too many where the head separated from the threaded portion of the screw/bolt, and also quite a few unthreaded bolts in a box. |
#35
Posted to rec.crafts.metalworking
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What are these self tapping screws called that form "real" threads?
On Sat, 27 Jun 2015 00:33:05 -0400, wrote:
On Fri, 26 Jun 2015 20:25:34 -0700, Gunner Asch wrote: On Fri, 26 Jun 2015 21:20:45 -0400, wrote: On Fri, 26 Jun 2015 16:01:08 -0700, Gunner Asch wrote: On Fri, 26 Jun 2015 13:24:03 -0400, wrote: On Fri, 26 Jun 2015 00:34:23 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 22:18:04 -0700, Larry Jaques wrote: On Thu, 25 Jun 2015 21:16:30 +0800, Techman wrote: On 25-Jun-15 7:55 PM, Lloyd E. Sponenburgh wrote: Techman fired this volley in : https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Techman, I think you're not 'getting it'. Even our CONSUMER big-box hardwares carry just what you want. Home Depot (of all places) carries M4-0.7 self-tapping screws. What you describe as "coarse-thread self-tappers" are truly "sheet metal screws". Lloyd I'm in Australia, our hardware stores are 20 years behind yours! They don't carry anything like them - only standard sheet metal screws and self drilling/tapping roofing sheet bolts. Only 20? I've found out today I can get them via RS Components. Oh, darn. That means you won't have the joy of jigging up small screws into a fixture in your vise and cutting the self tapping groove with a file on each screw. Dremal type tool and a decent cutoff wheel will work for that, in a pinch. Been there, done that more than once. Gunner But they pretty well have to be grade 8 or harder unless you are using them in anealed aluminum or leaded steel-------- Or thin mild steel. Ive used them to secure cover panels on various electrical cabinets, none of which were thicker than 1/4"...and anything over 1/8"...you best be having a really healthy driver to get em in. Ive driven them with a 1/2" Milwaukee "hole shooter" well enough..with a good snug properly made phillips bit. Gunner The ones made with the dremel??? Must be pretty decent quality fasteners you started with - not the cheap Chinese crap so often passed off as fasteners in big box hardware stores. I try to avoid buying much Chicom fasteners...though its getting damned hard to find any quality fasteners these days. It should be noted though..that the Chicoms are about where the Japs used to be in fastener making. Not half bad, unless you are buying second quality.."B" grade stuff. Gunner I've had too many where the head separated from the threaded portion of the screw/bolt, and also quite a few unthreaded bolts in a box. Ouch! Didnt buy those from Fastenal did you? (Grin) I was fortunate enough to have purchased a BUNCH of 60s-80s vintage American made fasteners at several estate sales in the past 10 or so years. Pluse I have a machine tool dealer that wont mess with "small lots" of fasteners..(anything under 5000 pieces) and I tend to wind up with a goodly number of them. https://picasaweb.google.com/1040422...02703427344786 Blow the photo up ..all the cabinet draws to the upper left are sorted fasteners..all the trays underneith are unsorted nuts and bolts... https://picasaweb.google.com/1040422...03465339215298 The gray and tan punch card cabinets are plumbing fittings and that sort of thing..a vertible ****load of them....and the cabinets to the right of them ..the gym cabinets..top 3 shelves are crimp on electrical fittings..sorted. Many thousands of them in their own boxes The bottom three cabinets are bulk boxes/trays filled with sheet metal and dry wall screws. Ive added another cabinet not show here (those photos are 5-6 yrs old) with things like drawers fulled with hinges, pop rivets/tools, turnbuckles, cable clamps, nails etc etc. I spent about 3 full days..14 hours a day..sorting out the many! 5 gallon buckets of fasteners/Stuff that I had stored in every corner and hidy hole. LOL..Larry can verify that Ive got a bunch..bunch of such stuff. Oh..since Ive been dabbling with sailboats...Ive added hummm...probably 100 lbs of 316 SS fasteners..from 6-32 - 5/16" bolts of all types and styles of head. I already had probably 75 lbs of such...so Ive not had to buy much stainless steel. Running short on 10-32 SS nuts though...and big flat washers. Need to ask around for a bunch of them. Based on local ACE Hardware store prices..Im a very rich man in fasteners alone...lol. They want $0.75 a piece for 10-32x 1" SS machine screws..and Ive got a few thousand.... (Grin) Gunner |
#36
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What are these self tapping screws called that form "real" threads?
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#37
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What are these self tapping screws called that form "real" threads?
Larry Jaques wrote:
Yesterday's client wanted me to use an EasyGate kit. One of the included screw's head was missing the philips depression altogether. I guess you're supposed to drive those in like nails, eh? So that's why they call a hammer an Amercan Screwdriver. |
#38
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What are these self tapping screws called that form "real" threads?
On Sat, 27 Jun 2015 13:10:05 -0700, Larry Jaques
wrote: On Sat, 27 Jun 2015 00:33:05 -0400, wrote: On Fri, 26 Jun 2015 20:25:34 -0700, Gunner Asch wrote: I try to avoid buying much Chicom fasteners...though its getting damned hard to find any quality fasteners these days. It should be noted though..that the Chicoms are about where the Japs used to be in fastener making. Not half bad, unless you are buying second quality.."B" grade stuff. I've had too many where the head separated from the threaded portion of the screw/bolt, and also quite a few unthreaded bolts in a box. Recently, I've had a rash of blast media (small clear crystals) in the philips head slots of micronized galv deck screws. They're also too hard, breaking where the thread and shank meet or up next to the bugle head. A few out of a 25# box isn't much to consider, but sometimes it was a few out a single handful of screws. Yesterday's client wanted me to use an EasyGate kit. One of the included screw's head was missing the philips depression altogether. I guess you're supposed to drive those in like nails, eh? Of course you put screws in with a hammer. The slots in the head are only there to take them out :-) -- cheers, John B. |
#39
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What are these self tapping screws called that form "real" threads?
On 27-Jun-15 1:20 AM, wrote:
On Fri, 26 Jun 2015 13:06:28 +0800, Techman wrote: On 26-Jun-15 6:15 AM, wrote: On Thu, 25 Jun 2015 13:50:45 -0700, Gunner Asch wrote: On Thu, 25 Jun 2015 12:05:20 -0700 (PDT), wrote: On Thursday, June 25, 2015 at 12:26:59 PM UTC-4, Clare wrote: On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. They are called thread forming screws. On jobsites, I've just heard them called tappets. Must be one of those regional things...never heard that term used for anything other than engines More likely Tappits. - but PK Tappits are used in sheet metal 0 they are NOT thread forming screws. Must be regional, in Oz, Tappits are plastic plugs with a nail in them that are used for hanging pictures or affixing to brick or concrete walls. Note - I qualified my statement with the brand - PK Tappits is a registered trademark. Yep, I did. |
#40
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What are these self tapping screws called that form "real" threads?
On Thursday, June 25, 2015 at 4:50:12 PM UTC-4, Gunner Asch wrote:
On Thu, 25 Jun 2015 12:05:20 -0700 (PDT), wrote: On Thursday, June 25, 2015 at 12:26:59 PM UTC-4, Clare wrote: On Thu, 25 Jun 2015 15:37:07 +0800, Techman wrote: I'm looking for some screws for use in production work. *Sick of tapping lots of M4 and M4 holes. *Used for attaching small brackets and DIN rail etc. *Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet. I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads. Is there a proper name for these screws: https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG Thanks. They are called thread forming screws. On jobsites, I've just heard them called tappets. Must be one of those regional things...never heard that term used for anything other than engines Its short for "tappet screws". They help attach straps to sheet metal studs. |
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