the hardness rating is HRC 24-35

00 x 150 Flat Socket Cap Screw 12

9/16-12 x 1 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (300)

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

3/4-10 x 3 1/4 Grade 8 Hex Cap Screw Plain Domestic USA (25)

7/16-20 x 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (100) Premium SDS Plus Hammer Drill Bits the hardness rating is HRC7 16 20 x 3 4 Grade 5 Hex Cap Screw Plain Domestic USA (100). 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