004 in, Pack Size Small Pack, Head Height 3/8 in, Head Diameter 7/8 in, Dimensional Standards ASME B18.-13, Minimum Thread Length 3/4 in, Shoulder Length 6 1/2 in, Shoulder Length Tolerance +/-0.005 in, Shoulder Diameter 5/8 in, Shoulder Diameter Tolerance -0.002 in to -0.