Nuts are made from a low-carbon steel which conforms to the following chemical composition requirements: Carbon-0

9/64 x 12 High Speed Aircraft Bit Cobalt

3/8-16 x 6 Grade 8 Hex Cap Screw Plain Domestic USA (175)

10 x 2 Simpson Flat-Head Marine Screw - Phillips Drive 316 SS - Box (100)

1/2-13 x 2 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (225) 5/8-18 L9 Hex Cap Screws Yellow Zinc Plated - Domestic USA Nuts are made from a1 2 13 x 2 1 2 Grade 8 Hex Cap Screw Plain Domestic USA (225). 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