Thread Forming Tap, Thread Size 1/4 In. -28, UNF, Overall Length 2.5 in, Cobalt, Bright (Uncoated), Right Hand, Thread Length 0.59 in, 75 Percent Thread Drill Size 5.90 mm, Thread Limit H5, Class of Fit 2B-3B. This item has been restricted from sale in the following state (s): []