Spiral Point Tap, Thread Size 1/2 In. -20, UNF, Overall Length 3 3/8 in, High Speed Steel, Black Oxide, Right Hand, Thread Length 1 5/8 in, 75 Percent Thread Drill Size 11.40 mm, Thread Limit H11, Class of Fit 1B, Number of Flutes 3. This item has been restricted from sale in the following state (s): []