5/16-18 x 2 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (600)

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1/2-13 x 8 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (80) M20-2.50 Socket Cap Screws 12.9 DIN 912 Zinc Plated 5/16-18 x 2 1/2 Grade1 2 13 x 8 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (80) . 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