The zinc plating provides a protective layer that enhances resistance against moisture

1/4-28 x 4 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (50)

3/4-10 x 3 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (65)

L9® High Tensile Strength Hex Collared Locknuts are designed for use in high stress

#23 x 6 High Speed Aircraft Bit Cobalt

5/16-24 x 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (1950) 7/8-14 L9 Hex Cap Screws Yellow Zinc Plated - Domestic USA The zinc plating provides a5 16 24 x 1 2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (1950) . 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