You haven't said what the application is. Roger may feel like he wasted his
time responding, if you're asking about mounting the chin-up bars you've
been talking about lately, but his post is informative.

You've been around enough, and it should be apparent to you that you need to
mention what it is, you're asking about.
There isn't much point in responding to questions when the person asking is
being vague, IMO.. many times it takes a couple of days before the details
are eventually presented.

If this is the same question asked again, about mounting the chin-up bar..
what're ya gonna do, keep asking until someone says it's a good idea to use
DW screws?

I don't like using DW screws for much of anything other than drywall. Ever
notice that sharp "snap" when they're overtightened?
The common DW screws are hard and brittle, and will break suddenly under
certain circumstances.
I definitely wouldn't use them in metal, but that's me.

You should be examining real screws.. self-tapping or other style for
mounting a chin-up bar.
Generally, the most secure method will be to get as many threads as possible
into the thickness of the material that the part is being attached to, which
means a fine-thread, self-tapping type screw, most likely (or nut-sert type
products that were mentioned previously).
If the fasteners that you recommend fail, the user could sustain a
laceration, or possibly brain trauma. Good luck fending off the lawyers.

If you're trying to come up with a simple solution for the end user to mount
a product that you intend to sell, safety should be the primary factor. If
some doofus can't install the product, then they'll return it to the seller,
or improvise a solution (not your problem).

--
WB
..........



"Existential Angst" wrote in message
...
Awl --

In metal, 16 ga. Related to my doorbuck Q, figgered I'd narrow it down a
little

How do the two compare, both fine and coarse thread? Loads would be
mostly in shear, but there could be some pullout forces.

I've never seen fine/coarse thread sheet metal screws, just in sheet rock
screws. Do they exist?

I'm assuming doorbucks are 16 ga.

--
EA