For diameters under 1 ½ inches

5/16-18 x 3 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (50)

7/16-14 x 3 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (300)

3/8-24 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (50)

2 1/2-4 x 10 Socket Cap Screw Alloy

1/2-20 x 1 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (300) 9/16-12 Hex Cap Screws 316 Stainless Steel For diameters under 1 ½1 2 20 x 1 1 2 Grade 8 Hex Cap Screw Plain Domestic USA (300). 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 diameters 1 4