Structural Bolt Heavy Hex Head Grade A325 Steel Finish Hot Dipped Galvanized Thread Size 1-8 Overall Length 5 In Thread Length 1 3/4 In Thread Type UNC Thread Direction Right Hand Head Dia 1 5/8 In Head Height 39/64 In Tensile Strength 120 000 PSI Rockwell Hardness HRC 34 Max Meets/Exceeds ASTM A325 Type 1 Package Quantity 40