... , 3*0.5, 4*0.7, 5*0.8, 6*0.75, 6*1.0, 7*0. ... 75, 7*1.0, 8*0.75, 8*1.0, 8*1.25, 9*0.75, 9* ... Taper Taps: 4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/4-20, 1/4-28, ... 1/4-24, 1/4-32, 5/16-18, 5/16-24, 3/8 ... -16, 3/8-24, 7/16-14, 7/16-20, 1 ... /2-13, 1/2-20, 9/16-12, 9/16-18, 5/8 ... -11, 5/8-18, 3/4-10, 3/4-16, ...