Shoulder Screw, Standard, Alloy Steel, Plain Finish, Head Style Knurled, System of Measurement Inch, Thread Size 5/8-11, Hex Socket Drive Type, Drive Size 3/8 in, Shoulder Dia. 3/4 in, Shoulder Length 8 in, Thread Length 7/8 in, Head Dia. 1 in, Head Height 1/2 in, Min. Tensile Strength (PSI) 140,000 psi, Shear Strength (PSI) 84,000 psi, Class 3A, Rockwell Hardness 32 to 43 HRC, Meets/Exceeds ASME B18.3, Package Quantity 19