Sheet Metal Screws
Sheet Metal Screws
(OP)
Hello,
Does any one have the following to share.
1. Hole sizes for different sheet metal screw sizes
2. Till what material thickness can we consider fastening with a sheet metal screw.
Any good reference material or a website is appreciated.
NBW
Does any one have the following to share.
1. Hole sizes for different sheet metal screw sizes
2. Till what material thickness can we consider fastening with a sheet metal screw.
Any good reference material or a website is appreciated.
NBW





RE: Sheet Metal Screws
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RE: Sheet Metal Screws
RE: Sheet Metal Screws
The max material thickness suitable for sheet metal screws depends on the load the screw will see, among other things. Just geometry-wise, the combined layer thickness needs to be ~65% max of screw pitch. So for a 12 pitch screw:
0.0833 in. X 0.65 = ~0.054 in. max thickness, combined, for however many layers you're joining
So you see, you're question is very application-specific.
RE: Sheet Metal Screws
That's very informative information. Thanks for sharing it here.
May be I did not search hard enough, But I could not find the Pitch information for a Sheet metal screw. It may depended on Type again; But I could not find it.
Thanks
BNW
RE: Sheet Metal Screws
That chart on page 3010 on the McMaster site shows available pitches for each diameter.
RE: Sheet Metal Screws
This is especially valid in thin sheets.
StrykerTECH Engineering Staff
http://www.stryker-tech.com/
RE: Sheet Metal Screws
You are right. It was sharing 2 rows & I was confused.
Thanks
RE: Sheet Metal Screws
Thats interesting. From what I could understand; this is clip-on part generally used closed to the edge of sheet metal. You are right, it sure would resist stripping.
I think they wouldn't require any pre-preparation on the sheet metal prior to install. It might require a large clearance hole.
What are your comments.
RE: Sheet Metal Screws
Tinnerman makes a bewildering array of clip-on fasteners that accept sheet metal screws, and another bewildering array of similar clip-ons that accept machine screws, and another bewildering array of fasteners that clip sheets to sheets with no male fastener at all.
The most common ones for sheet metal require a punched round hole and a nearby edge or rectangular hole for application of the "clip nut" itself.
See bewildering arrays starting here:
htt
Many of Tinnerman's products are specific to the auto industry, and may be available only by the ton.
For parts available in smaller quantities, start here:
http://www.mcmaster.com/#clip-on-nuts/=afmevl
Mike Halloran
Pembroke Pines, FL, USA
RE: Sheet Metal Screws
so tinnerman <--- no, helical punch similar to a tinnerman product, but a whole lot cheaper and easier to work with. YES.
Sorry my jargon got the best of me.
StrykerTECH Engineering Staff
http://www.stryker-tech.com/
RE: Sheet Metal Screws
#10 Sheet metal screw Tri-lobe
#12 Sheet metal screw Tri-lobe
#10 Tap tite screw. (great for thicker sheet steel.)
We are in the midwest, sheet metal is what we do up here.
StrykerTECH Engineering Staff
http://www.stryker-tech.com/
RE: Sheet Metal Screws
So it appears that using a special punch to produce that shape might be better than simply using a simple hole.
StrykerTECH you mentioned using this even on a 12 GA sheet. That's very thick and can you please share the specs of the one such feature and the specs of the screw that goes on it.
RE: Sheet Metal Screws
RE: Sheet Metal Screws
For 12ga we mainly use taptite tri-lobular sheet metal screws. Those things are rock solid, can't strip them and our self-threading.
When we really need holding power WITH removability we go with extrusions in the metal and tap-tite screws for lighter guages.
StrykerTECH Engineering Staff
Milwaukee, WI
http://www.stryker-tech.com/
RE: Sheet Metal Screws
nice job,
That is the process we used. We have just been calling in tinnermans, since it resembles the end result.
"Dayton process"
Star for you.
StrykerTECH Engineering Staff
Milwaukee, WI
http://www.stryker-tech.com/