Electrical boxes -- screw size?
On 01/01/10 02:32 pm, RBM wrote:
I have mislaid the screws that originally held one of those old ceramic light sockets in place on a hard plastic ("Bakelite"? Or is that a British name?) box. What size and thread are those screws? Not sure what your asking for, but there are ceramic lampholders that screw to 3 and 4 inch round boxes, which use 8/32 machine screws 8-32 was my guess, but it just pushed through the first hole. Worked fine in the second hole, so I used a sheet-metal screw in the first hole, which I assume had a stripped thread. Perce |
Electrical boxes -- screw size?
replying to Percival P. Cassidy, Tyler wrote:
Im so confused by this and have never gotten to the bottom of it. I have run into needing a longer screw than included with ceiling boxes/junction boxes. 6-32 is too small (threads in but is wiggly) and 8-32 is too large. I have found in my miscellaneous screws some sort of perfect in between size that Im wondering if is a metric. Anytime I look into it, people just say 6-32 for wall stuff and 8-32 for ceiling stuff and thats that. But this simply isnt the case in my experience. There is a metric that must be similar to what a 7-32 screw would be. -- for full context, visit https://www.homeownershub.com/mainte...ze-416095-.htm |
Electrical boxes -- screw size?
On Sat, 02 Jun 2018 21:44:01 GMT, Tyler
m wrote: replying to Percival P. Cassidy, Tyler wrote: Im so confused by this and have never gotten to the bottom of it. I have run into needing a longer screw than included with ceiling boxes/junction boxes. 6-32 is too small (threads in but is wiggly) and 8-32 is too large. I have found in my miscellaneous screws some sort of perfect in between size that Im wondering if is a metric. Anytime I look into it, people just say 6-32 for wall stuff and 8-32 for ceiling stuff and thats that. But this simply isnt the case in my experience. There is a metric that must be similar to what a 7-32 screw would be. Standard device boxes use 6-32, ceiling boxes (octagons) intended for luminaires use 8-32 and fan boxes use 10-32. There are no metric screws in current US boxes. Some day maybe and if you are in Canada, who knows? |
Electrical boxes -- screw size?
On Saturday, June 2, 2018 at 6:22:55 PM UTC-5, wrote:
On Sat, 02 Jun 2018 21:44:01 GMT, Tyler m wrote: replying to Percival P. Cassidy, Tyler wrote: Im so confused by this and have never gotten to the bottom of it. I have run into needing a longer screw than included with ceiling boxes/junction boxes. 6-32 is too small (threads in but is wiggly) and 8-32 is too large. I have found in my miscellaneous screws some sort of perfect in between size that Im wondering if is a metric. Anytime I look into it, people just say 6-32 for wall stuff and 8-32 for ceiling stuff and thats that. But this simply isnt the case in my experience. There is a metric that must be similar to what a 7-32 screw would be. Standard device boxes use 6-32, ceiling boxes (octagons) intended for luminaires use 8-32 and fan boxes use 10-32. There are no metric screws in current US boxes. Some day maybe and if you are in Canada, who knows? When I was doing electrical work, I often came across stripped out threads on ceiling boxes so I had self-drilling and thread cutting screws to use. If there was enough metal, I was able to drill a larger hole and install a rivnut which had a lot more threads for a screw which held a heavy fixture much more securely. ^_^ http://www.rivet-nut.com/index.html http://rivetnutusa.com/ [8~{} Uncle Nutty Monster |
Electrical boxes -- screw size?
|
Electrical boxes -- screw size?
On Sat, 2 Jun 2018 19:36:02 -0700 (PDT), Uncle Monster
wrote: On Saturday, June 2, 2018 at 6:22:55 PM UTC-5, wrote: On Sat, 02 Jun 2018 21:44:01 GMT, Tyler m wrote: replying to Percival P. Cassidy, Tyler wrote: Im so confused by this and have never gotten to the bottom of it. I have run into needing a longer screw than included with ceiling boxes/junction boxes. 6-32 is too small (threads in but is wiggly) and 8-32 is too large. I have found in my miscellaneous screws some sort of perfect in between size that Im wondering if is a metric. Anytime I look into it, people just say 6-32 for wall stuff and 8-32 for ceiling stuff and thats that. But this simply isnt the case in my experience. There is a metric that must be similar to what a 7-32 screw would be. Standard device boxes use 6-32, ceiling boxes (octagons) intended for luminaires use 8-32 and fan boxes use 10-32. There are no metric screws in current US boxes. Some day maybe and if you are in Canada, who knows? When I was doing electrical work, I often came across stripped out threads on ceiling boxes so I had self-drilling and thread cutting screws to use. If there was enough metal, I was able to drill a larger hole and install a rivnut which had a lot more threads for a screw which held a heavy fixture much more securely. ^_^ http://www.rivet-nut.com/index.html http://rivetnutusa.com/ [8~{} Uncle Nutty Monster There are also speed nuts and even T nuts that will clip over the ears of a box but usually you can just thread it to the next bigger size. That is why Klein sells that screwdriver style tap that starts 6-32 and ends up 10-32. Keep screwing it in until it bites ;-) |
Electrical boxes -- screw size?
On Sunday, June 3, 2018 at 12:23:34 AM UTC-5, wrote:
On Sat, 2 Jun 2018 19:36:02 -0700 (PDT), Uncle Monster wrote: On Saturday, June 2, 2018 at 6:22:55 PM UTC-5, wrote: On Sat, 02 Jun 2018 21:44:01 GMT, Tyler m wrote: replying to Percival P. Cassidy, Tyler wrote: Im so confused by this and have never gotten to the bottom of it. I have run into needing a longer screw than included with ceiling boxes/junction boxes. 6-32 is too small (threads in but is wiggly) and 8-32 is too large. I have found in my miscellaneous screws some sort of perfect in between size that Im wondering if is a metric. Anytime I look into it, people just say 6-32 for wall stuff and 8-32 for ceiling stuff and thats that. But this simply isnt the case in my experience. There is a metric that must be similar to what a 7-32 screw would be. Standard device boxes use 6-32, ceiling boxes (octagons) intended for luminaires use 8-32 and fan boxes use 10-32. There are no metric screws in current US boxes. Some day maybe and if you are in Canada, who knows? When I was doing electrical work, I often came across stripped out threads on ceiling boxes so I had self-drilling and thread cutting screws to use.. If there was enough metal, I was able to drill a larger hole and install a rivnut which had a lot more threads for a screw which held a heavy fixture much more securely. ^_^ http://www.rivet-nut.com/index.html http://rivetnutusa.com/ [8~{} Uncle Nutty Monster There are also speed nuts and even T nuts that will clip over the ears of a box but usually you can just thread it to the next bigger size. That is why Klein sells that screwdriver style tap that starts 6-32 and ends up 10-32. Keep screwing it in until it bites ;-) That Klein multi-tap screwdriver-like tool is in my toolbelt and I made a lot of use of it. Dang! I miss working! I've had so many tools stolen over the years that it really makes me angry and sad at the same time. o_O [8~{} Uncle Tool Monster |
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