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
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
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
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
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

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
"Proctologically Violated" wrote:

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
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.