Since its introduction

1 1/8-7 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (8)

8 DIN 931 Zinc Plated - Class 8

5/16-18 x 6 Grade 8 Hex Cap Screw Plain Domestic USA (250)

5/16-18 x 5/8 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (100)

1/2-20 x 1 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (50) Round Split Drive Anchors Zinc Plated Since its introduction1 2 20 x 1 1 2 Grade 5 Hex Cap Screw Plain Domestic USA (50). 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 of