Spiral Point Tap, Thread Size 9/16 In. -18, UNF, Overall Length 4 5/16 in, HSS-E, Black Oxide, Right Hand, Thread Length 1 3/4 in, 75 Percent Thread Drill Size 12.90 mm, Thread Limit 2B, Class of Fit 2B, Number of Flutes 3. This item has been restricted from sale in the following state (s): []