5/16-18 x 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (1950)

1/2-13 x 5 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

7/16 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (1800)

5/8-18 x 9 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

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5/8-18 x 8 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) Strong-Drive SDWH Timber-Hex Screws Double-Barrier Coated 5/16-18 x 1/2 Grade 55 8 18 x 8 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (10) . 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