Thread Forming Tap, Thread Size 1/4 In. -20, UNC, Overall Length 2.5 in, High Speed Steel, Bright (Uncoated), Right Hand, Thread Length 0.63 in, 75 Percent Thread Drill Size 5.70 mm, Thread Limit H6, Class of Fit 2B-3B. This item has been restricted from sale in the following state (s): []