8 x 1 5/8 Simpson Bugle-Head Wood Decking Screws - Square Drive T17 316 SS - Bulk Pail (4000)

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

5/32 Heavy Duty Drill Bit - Stubby Length

5/8-18 x 5 Socket Cap Screw Alloy

#54 Heavy Duty Drill Bit - Stubby Length

9 x 3 1/2 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - Bulk Pail (1500) 5/8 Hex Lag Screws Zinc Plated 8 x 1 5/8 Simpson9 x 3 1 2 Simpson Trim Head Wood Decking Screws Square Drive 305 SS Bulk Pail (1500) . 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