5/16-18 x 1 1/4 Grade 5 Hex Cap Screw Plain Domestic USA (1100)

9/16-12 x 6 Hex Cap Screw SS 18-8 (A2)

Typical hardness is HRB 70-100

1/2-13 x 2 1/4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (50)

5/16-18 x 2 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (600)

7/8-14 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (30) 7/8-14 Grade 8 Hex Cap Screws Plain - Domestic USA 5/16-18 x 1 1/4 Grade7 8 14 x 6 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