5/16-18 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (50)

1-8 x 2 1/2 Socket Cap Screw Alloy

5/8-18 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated

1/2-13 x 5 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (100)

1/4-28 x 1 1/4 Grade 8 Hex Cap Screw Plain Domestic USA (100)

7/16-20 x 3 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50) 5/16-18 Grade 8 Hex Cap Screws Plain - Domestic USA 5/16-18 x 4 L9 Hex7 16 20 x 3 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50) . 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