Spiral Point Tap, 1/2-20, Plug, UNF, 3 Flutes, TiCN
40 mm, Thread Limit H10, Class of Fit 6H, Number of Flutes 3.Spiral Point Tap, Thread Size 1/2 In.-20, UNF, Overall Length 3 11/32 in, High Speed Steel, TiCN, Right Hand, Thread Length 15/16 in, 75 Percent Thread Drill Size 11.