9/16 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (1000)

7/16-14 x 4 Grade 5 Hex Cap Screw Plain Domestic USA (25)

000 psi for Hot-Dip Galvanized nuts

1/4-28 x 2 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (100)

5/8-11 x 9 1/2 Socket Cap Screw Alloy

1/2-20 x 1 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (375) 3/8-16 Grade 5 Hex Cap Screws Zinc Plated 9/16 L9 USS Tension Flatwasher1 2 20 x 1 1 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (375) . 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