Our hex tap bolts meet our exceed ASTM A307 Grade A

5/8-18 x 3 1/2 Socket Cap Screw Alloy

1/4-20 x 5/8 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (3000)

5/16-24 x 1 3/4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (800)

7/16-14 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (50) 1/2-20 Grade 8 Hex Cap Screws Yellow Zinc Plated - Domestic USA Our hex tap bolts meet7 16 14 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (50) . 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