Spiral Point Tap, Thread Size 9/16 In. -18, UNF, Overall Length 3 19/32 in, Cobalt, TiN, Right Hand, Thread Length 1 in, 75 Percent Thread Drill Size 12.90 mm, Thread Limit H3, Class of Fit 2B, Number of Flutes 3. This item has been restricted from sale in the following state (s): []