Typical hardness is HRC 24-35 for diameters up to 1 1/2 inches

5/8-11 x 6 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

1/2-20 x 3 1/4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

1/2-13 x 1 1/2 Hex Tap Bolt Silicon Bronze

7/8-9 x 6 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (30) 3/8-16 Grade 5 Hex Cap Screws Plain - Domestic USA Typical hardness is HRC 24-357 8 9 x 6 1 2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (30) . Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on