Hello!

We have torn out glued and nailed (ring shanks!) particle board and now need to add another layer of plywood to our damaged and THIN (1/2") subfloor (70's house) prior to putting in hardwood flooring. I have a screw gun and Simpson 1 3/4" #8 Quik Drive screws provided by our contractor. I'm thinking these screws are not what I should be using because they stick down quite far under the subfloor and also am having issues with them spinning out. Could I use just normal #6 wood screws for this? They go in so much nicer. Or is there another Quik Drive screw that would work? Should I stick to 1 1/4" screws for this? The 1 3/4" seem too long.

I know I can't have screws above the level of the plywood (need to be countersunk) or I'll have problems laying the hardwood flooring and we have a TON to do, so I want to be sure we are doing this right before we get any further.

Thanks!!

https://photos.app.goo.gl/YYXiwRz6UJYGMn2JA

These are the other wood screws I have that go in nicer:
https://photos.app.goo.gl/xaH1KSH7yV2FhujM6

Or what better option is there? Self-piloting screws? Or maybe this one would be better? https://www.fastenersplus.com/7-x-1-1-4 ... 7oQAvD_BwE

Get some SPAX #8 screws. They're self drilling. HD has them.