Awl --
I'm a big fan of coarse thread drywall screws, for mounting metal to wood (indoors), or even deck screws, but the head is not an 82 deg c-sink, in fact, the underside is curved.
Can I get a drywall-type thread (coarse) with an 82 deg head (or 90 deg, any standard c-sink angle)? Traditional sheet metal screws have a large-ish root diameter, not enough "bite" in the threads.
Don't know where to get drywall screws with true flat head config but McFeely's has lots o coarse thread flat head wood screws that should work for you... like this
has lots o coarse thread flat head wood screws that should work for you... like this
What is the problem with traditional wood screws?
looking at Mcmaster, drywall screw #99136A100
but part #90031A153, a No. 6?#2 Phillips Drive Zinc-Plated Wood Screws appears to be what you are looking for.
Stephen B
Mcmaster Carr probably has something that was engineered to do whatever it is you are wanting to do.
They use them all the time in production woodworking, Go to McFeely's and look around.
Paul K. Dickman
Feely's has lots o coarse thread flat head wood screws that should work for you... like this
They're also not as strong as wood screws because they don't have to be.
The only question I have about these, are they soft metal like you often see in the home centers, or are they heat treated like you find with McFeeley's. The right heat treatment makes the screws tough but not brittle.
Having used heat treated screws before, I hate using the run of the mill stuff anymore.
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