Lag screws longer than 12 inches will have a minimum thread length of 50% of the screw length up to a maximum of 8 inches

9/16-18 x 2 1/4 Socket Cap Screw Alloy

3/16 x 2 1/2 Mushroom Spike Zinc Plated (100)

Threaded to within 5/16" of top of head

10 x 4 Phillips Bugle Coarse Drywall Screws Phosphate - Carton (800) Star Flat Decking Screws Yellow Zinc Plated Lag screws longer than 1210 x 4 Phillips Bugle Coarse Drywall Screws Phosphate Coated Carton (800) . Intercorp Strong Point drywall screws are designed to attach gypsum board to wood studs. Meets ASTM A510 for carbon steel manufacturing. Meets ASTM C1002 for attaching gypsum board to wood studs.