1/4 x 3 1/2 Mushroom Spike Zinc Plated (100)

3/4-10 x 4 1/4 Hex Cap Screw SS 316 (A4)

1/4-20 x 2 1/4 Simpson STB2 Wedge Anchor 304 SS (100)

1 1/8-12 x 7 Socket Cap Screw Alloy

8 x 2 1/4 Simpson Self-Drilling Fiber-Cement Screws 410 SS - Carton (1000) 1 1/4-7 Socket Cap Screws Alloy 1/4 x 3 1/2 Mushroom8 x 2 1 4 Simpson Self Drilling Fiber Cement Screws 410 SS Carton (1000) . Fasten fiber cement through furring strips to steel studs #2 square drive wafer head, #3 drill point Self countersinking nibs under head insure seating of screw head flush with work surface Threaded to within 5 16" of top of head Drilling thickness capacity: up to 0. 142" (118 mils or 10 ga.)