Spiral Point Tap, Thread Size 3/8 In. -16, UNC, Overall Length 2 15/16 in, High Speed Steel, Black Oxide, Right Hand, Thread Length 25/32 in, 75 Percent Thread Drill Size 0.3125 in, Thread Limit Not Applicable, Class of Fit 2B+, Number of Flutes 3. This item has been restricted from sale in the following state (s): []