Inch, Structural Bolt, Steel, Material Grade A325 Type 1, A563-C, Fastener Finish Plain, Dia. /Thread Size 1/2 In. -13, Fastener Length 4 in, Fastener Thread Type UNC (Coarse), Fastener Industry Standards ASTM 563, ASTM F3125, Thread Length 1 in, Fastener Thread Direction Right Hand, Head Dia. 7/8 in, Head Height 5/16 in, Tensile Strength (PSI) 105, 000 psi, Rockwell Hardness HRC25, Includes Heavy Nut, Package Quantity 25. This item has been restricted from sale in the following state (s): []