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

7/8-14 x 2 1/4 Hex Cap Screw SS 18-8 (A2)

1-8 x 4 1/4 Socket Cap Screw Alloy

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7 x 2 1/4 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - 5 lbs Pack (690) 1 3/4-5 Socket Cap Screws Alloy 1/4 x 2 1/2 Round7 x 2 1 4 Simpson Trim Head Wood Decking Screws Square Drive 305 SS 5 lbs Pack (690) . 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