In diameters 1/4 to 1 1/2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications

Grade 8 Hex Cap Screws are manufactured from medium carbon alloy steel

3/4-10 x 8 A307 Grade A Carriage Bolt Zinc Plated

1-8 x 1 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

Diameters over 1 1/2 inches meet or exceed ASTM A354 Grade BD

3/4-10 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated 5/8-11 A307 Grade A Carriage Bolts Zinc Plated In diameters 1/4 to 13 4 10 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated . Grade 8 Hex Cap Screws are manufactured 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 diameters 1 4 to 2 1 2 inches is