Screw Thread Insert STI Tap, Thread Size 1/2 In. -20, UNF, Overall Length 3 37/64 in, High Speed Steel, Bright (Uncoated), Right Hand, Thread Length 1.153 in, Tap Chamfer Bottoming, Thread Limit H3, Class of Fit 2B-3B, Number of Flutes 4. This item has been restricted from sale in the following state (s): []