9/16-18 x 4 1/2 Hex Cap Screw SS 18-8 (A2)

9/16-12 x 3 1/2 Hex Cap Screw SS 316 (A4)

#40 Heavy Duty Drill Bit - Stubby Length

11/64 Heavy Duty Jobber Drill Bit

9 x 4 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - 5 lbs Pack (305) M24-3.00 Socket Cap Screws 12.9 Alloy Plain DIN 912 9/16-18 x 4 1/2 Hex9 x 4 Simpson Trim Head Wood Decking Screws Square Drive 305 SS 5 lbs Pack (305) . 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