Zinc plated material will meet or exceed ASTM F1941

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7/8-9 x 4 1/4 Hex Cap Screw SS 316 (A4)

1 1/8-7 x 14 Socket Cap Screw Alloy

HRB 95 - HRC 35 for diameters over 1 1 1/2 inches

7 x 3 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - 1 lbs Pack (98) 7/16-14 Hex Cap Screws 316 Stainless Steel Zinc plated material will meet7 x 3 Simpson Trim Head Wood Decking Screws Square Drive 305 SS 1 lbs Pack (98) . 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