When used with castle or slotted nuts

1/4 x 1 1/2 Mushroom Spike Zinc Plated (100)

1 1/8-7 x 3 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (40)

9/16 x 6 Reduced Shank Drill Bit (1/2 Shank)

3/8-16 x 5 Grade 8 Hex Cap Screw Plain Domestic USA (225)

5/8-11 x 2 1/4 Grade 8 Hex Cap Screw Plain Domestic USA (150) M20-2.5 Hex Cap Screws 8.8 DIN 931 Zinc Plated When used with castle or5 8 11 x 2 1 4 Grade 8 Hex Cap Screw Plain Domestic USA (150). 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