1-8 x 5 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (10)

Hardness: Rockwell hardness ranges from B68 to C32

1-14 x 4 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (30)

7/16-20 x 3 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (225)

1/4-28 x 3 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (500) 5/16-18 L9 Hex Cap Screws Yellow Zinc Plated - Domestic USA 1-8 x 5 L9 Hex1 4 28 x 3 3 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (500) . 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