0 in, Pack Size Small Pack, Head Height 1/4 in, Head Diameter 3/4 in, Dimensional Standards AMPG 2006 HH.-16, Minimum Thread Length 3/4 in, Shoulder Length 2 1/2 in, Shoulder Length Tolerance +/-0.005 in, Shoulder Diameter 1/2 in, Shoulder Diameter Tolerance -0.004 in to +0.