Structural Bolt Heavy Hex Head Grade A325 Steel Finish Hot Dipped Galvanized Thread Size 3/4-10 Overall Length 4 1/2 In Thread Length 1 3/8 In Thread Type UNC Thread Direction Right Hand Head Dia 1 1/4 In Head Height 15/32 In Tensile Strength 120 000 PSI Rockwell Hardness HRC 34 Max Meets/Exceeds ASTM A325 Type 1 Package Quantity 85