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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
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Shoulder sheet metal screws
Awl--
Anyone hear of these? So far the few screw houses I've talked to have drawn blanks. Links? ---------------------------- Mr. P.V.'d formerly Droll Troll |
#2
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Sure I've seen them. The weakest point in a sheet metal screw is the
diameter just under the head. Any strain will tear the sheet metal. There are screws with a shoulder machined on the head so it will fit into a larger diameter hole in the sheet metal being fastened. The shoulder distributes the stress on the metal [skin] over a larger area I believe they are used in the aircraft industry mostly to fasten Al panels. I wouldn't lnow a source for them, but they are probably described in the AN military specs. Bugs |
#3
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Certainly makes sense, which is partially why I want to use them.
But I thought everything in aircraft was nutted or riveted. They actually use sheetmetal screws on planes?? ---------------------------- Mr. P.V.'d formerly Droll Troll "Bugs" wrote in message oups.com... Sure I've seen them. The weakest point in a sheet metal screw is the diameter just under the head. Any strain will tear the sheet metal. There are screws with a shoulder machined on the head so it will fit into a larger diameter hole in the sheet metal being fastened. The shoulder distributes the stress on the metal [skin] over a larger area I believe they are used in the aircraft industry mostly to fasten Al panels. I wouldn't lnow a source for them, but they are probably described in the AN military specs. Bugs |
#4
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"Proctologically Violated©®" wrote:
Awl-- Anyone hear of these? So far the few screw houses I've talked to have drawn blanks. Links? ---------------------------- Mr. P.V.'d formerly Droll Troll I have found that knowing the correct name is 90% of finding anything when dealing with the droids behind the counter anywhere. Perhaps they have a name other than that you call them, perhaps they are a proprietary design. Happy hunting! Cheers Trevor Jones |
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