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

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

(AF8™) 5/16 ALLIGATOR® Anchor w/ Flange Nylon (100)

9/16-18 x 6 Socket Cap Screw Alloy

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 5/16-24 x 2 3/4 Grade7 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