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

1/2 Heavy Duty Jobber Drill Bit

3/4-16 x 4 Grade 8 Hex Cap Screw Plain Domestic USA (25)

5/8-11 x 1 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25)

2-4 1/2 x 7 Socket Cap Screw Alloy

5/8-18 x 5 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) 5/8-18 Grade 5 Hex Cap Screws Zinc Plated - Domestic USA Coarse threads run approximately 2/35 8 18 x 5 1 2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) . 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