Spiral Flute Tap, Thread Size 1/4 In. -20, UNC, Overall Length 2 33/64 in, Powdered Metal, Black Oxide/Nitride, Thread Length 7/16 in, 75 Percent Thread Drill Size #7, Thread Limit H3, Class of Fit 3B, Thread Direction Right Hand, Number of Flutes 3. This item has been restricted from sale in the following state (s): []