9/16-18 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (150)

3/16 x 1 1/2 Mushroom Spike 316 SS (100)

5/16-24 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (550)

3/4-16 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (20)

Threaded to within 5/16" of top of head

7/16-20 x 3 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) 9/16-12 Grade 8 Hex Cap Screws Plain - Domestic USA 9/16-18 x 4 L9 Hex7 16 20 x 3 3 4 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