-20, UNC, Overall Length 2 1/2 in, High Speed Steel, TiN, Thread Length 5/8 in, 75 Percent Thread Drill Size #7, Thread Limit H3, Thread Direction Right Hand, Number of Flutes 3.Spiral Flute Tap, Thread Size 1/4 In.
52 mm, Thread Limit H3, Class of Fit 3B.Thread Forming Tap, Thread Size #4-40, UNC, Overall Length 1 55/64 in, Cobalt, TiN, Right Hand, Thread Length 1/4 in, 75 Percent Thread Drill Size 2.