A307 Grade A Carriage Bolts are manufactured from low carbon steel to meet or exceed ASTM A307 Grade A

1-14 x 3 Grade 5 Hex Cap Screw Zinc Plated

1-14 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated

1-8 x 9 Grade 8 Hex Cap Screw Yellow Zinc Plated

7/8-9 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated 3/4-16 Grade 8 Hex Cap Screws Yellow Zinc Plated A307 Grade A Carriage Bolts7 8 9 x 3 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