00 x 80 Socket Cap Screw 12

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2 1/2-4 A563 Grade A Heavy Hex Nut Plain Phillips Flat Undercut Machine Screws Black Zinc Plated 00 x 80 Socket Cap2 1 2 4 A563 Grade A Heavy Hex Nut Plain . Grade A Heavy Hex Nuts are manufactured from low carbon steel, 1008 1010 for sizes up to 1 inch (cold formed) and 1045 steel for sizes over 1 inch (hot formed). Material is manufactured to meet or exceed ASTM A563 Grade A. Zinc plated material will meet or exceed ASTM F1941. Hot Dip Galvanized material will meet or exceed ASTM A563. Typical hardness is HRB 68 HRC 32. Proof load strength will meet a minimum of