Drywall Screws
This information reflects our best understanding of product composition in 2015.
ASTM C1002 identifies the screws used to attach drywall to steel studs as Type S: made from steel as described in ASTM A568, with fine threads, designed to be self piercing, and not less than .315 inches (8mm) in screw head diameter or .136 inches...
ASTM C1002 identifies the screws used to attach drywall to steel studs as Type S: made from steel as described in ASTM A568, with fine threads, designed to be self piercing, and not less than .315 inches (8mm) in screw head diameter or .136 inches (3.45 mm) in diameter. The screws have a flat, Phillips head, and are treated to be corrosion resistant. This CP describes a 1 inch long #6 gauge screw.