Inch, Structural Bolt, Steel, Material Grade A325 Type 1, Fastener Finish Zinc Yellow, Dia. /Thread Size 1/2 In. -13, Fastener Length 1 1/4 in, Fastener Thread Type UNC (Coarse), Fastener Industry Standards ASTM A325 Type 1, Thread Length 1 in, Fastener Thread Direction Right Hand, Head Dia. 7/8 in, Head Height 5/16 in, Tensile Strength (PSI) 120, 000 psi, Rockwell Hardness HRC25, Package Quantity 50. This item has been restricted from sale in the following state (s): []