Spiral Point Tap, Thread Size 1/2 In. -20, UNF, Overall Length 4 21/64 in, Cobalt, Black Oxide, Right Hand, Thread Length 1 17/32 in, 75 Percent Thread Drill Size 11.40 mm, Thread Limit 2B, Class of Fit 2B, Number of Flutes 3. This item has been restricted from sale in the following state (s): []