Screw Thread Insert STI Tap, Thread Size 1/2 In. -20, UNC, Overall Length 3 37/64 in, High Speed Steel, Bright (Uncoated), Right Hand, Thread Length 1 21/32 in, Tap Chamfer Plug, Thread Limit H3, Number of Flutes 4. This item has been restricted from sale in the following state (s): []