Coarse threads run approximately 2/3 up the shank to draw the decking tightly to the substrate

Fasten fiber cement through furring strips to wood or steel studs

10 x 2 1/2 Simpson Flat-Head Deck-Drive™ DWP Wood Screws - 6-Lobe Drive 316 SS - Deck Pack (350)

12 x 2 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Box (100)

25/64 Cobalt Heavy Duty Jobber Drill Bit

M20-2.50 x 100 Socket Cap Screw DIN 912 18-8 (A2) Stainless Steel Wedge Anchors Mechanically Galvanized Coarse threads run approximately 2/3M20 2. 50 x 100 Socket Cap Screw DIN 912 18 8 (A2) Stainless Steel . Socket Cap Screws in 18 8 (A2) Stainless Steel by Brighton Best. Conform to DIN 912.