I have been using Drywall screws for joinery for a long time. Only use where they won't be seen, (or in rare cases, counter-bore and then use plug cutter from stock I am working on to match wood grain and color,) and basically just to hold pieces together while glue dries. Down side is that countersink sets are 82 degrees, which doesn't match. Upside all these years is the coarse thread and the rarity of heads snapping off with that last turn, as opposed to a lot of the crap zinc wood screws.
Anyone have a favorite brand of standard interior use flat head wood screw, either Phillips or square head (many have combo heads, my old school process still likes the Phillips) and a place to buy them?
I typically buy a lb or 100 pieces at a time and have from 1" to 2" in #6, and 1 5/8 to 3 in #8 in stock at all times...about 10 boxes.
Browsing at Rockler, they didn't even carry bulk #6.
#6 and #8 take care of probably 90% of my needs. Occasionally #10....if it needs larger than than that I am probably looking at a lag screw, carriage bolt, !/4 20 hardware, etc.
Brand and where to get them, folks...????