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

5/16-18 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (450)

5/16-18 x 5 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50)

10-16 x 4 Phillips Drywall Self Drill Screw Zinc Plated (1000)

7/8-9 x 3 3/4 Hex Cap Screw SS 18-8 (A2)

9/16-18 x 1 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (350) 5/16-18 L9 Hex Cap Screws Yellow Zinc Plated - Domestic USA Coarse threads approximately 2/3 up9 16 18 x 1 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (350) . Grade 5 Hex Cap Screws are manufactured in the USA from medium carbon steel. Our Grade 5 material meets or exceeds SAE J429 Grade 5 specifications. All products are manufactured with rolled threads. Typical hardness on diameters 1 4 to 1 inch is HRC 25 34. On diameters over 1 inch to 1 1 2 hardness will range from HRC 19 30. Tensile strength for diameters 1 4 to 1 inch is a minimum of