1/4 x 2 1/2 Round Split Drive Anchor Zinc Plated (100)

7/8-14 x 5 1/2 Hex Cap Screw SS 18-8 (A2)

7/8-9 x 5 Socket Cap Screw Alloy

3/4 x 18 Hex Lag Screw Hot Dipped Galvanized

9 x 4 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - Bulk Pail (1000) Jobber Drill Bits - Cobalt 1/4 x 2 1/2 Round9 x 4 Simpson Trim Head Wood Decking Screws Square Drive 305 SS Bulk Pail (1000) . The type 17 tip provides fast starting and resists splitting in hardwood. Coarse threads run approximately 2 3 up the shank to draw the decking tightly to the substrate. Pre drilling is recommended near board ends to prevent splitting. #1 Square Drive All #7 diameters and 9 x 3 1 2 #2 Square Drive 9 x 4