Hardness: Rockwell C45-53

7/16-20 x 1 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (450)

1 1/4-7 x 4 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (5)

Tensile strength on diameters 1/4 to 1 inch will meet a minimum of 120

9/16-12 x 1 1/4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) M16-2.0 Hex Cap Screws 8.8 DIN 931 Zinc Plated Hardness: Rockwell C45-539 16 12 x 1 1 4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) . 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