Thread Forming Tap, Thread Size 1/4 In. -28, UNF, Overall Length 2 1/2 in, High Speed Steel, Bright (Uncoated), Right Hand, Thread Length 5/8 in, 75 Percent Thread Drill Size 5.90 mm, Thread Limit H4, Class of Fit 2B. This item has been restricted from sale in the following state (s): []