| BTW I'm not asking for a source for #8 2.5" wood screws, I'm just curious
| about how the multi-material construction screws would work in place of
| wood screws. I would never trust the "no need to predrill" claim for
| anything that I cared about, but other than that, would there be a problem
| using these screws in wood?
I never use wood screws. Those are for the old
days, when holes were drilled by hand. What you're
looking at is what I think of as sheet metal screws.
I use coarse thread drywall screws for most purposes.
The same thing coated for outside. They're similar
to sheet metal screws. Buying those in 5# boxes, I
don't usually need to buy small bags of screws.
I don't pre-drill for most purposes. Drywall, framing,
cabinet work.... usually I just drive them because
they're thing enough not to crack the wood. But they
have low shear strength, so there are some places
I don't use them.
Today I was building stairs with a railing. I used
coated "construction screws" (basically #8 drywall
screws) to attach fir ballusters to PT horizontals.
Those I do predrill. Not the PT, but the fir.