Pipe and Conduit Thread Tap, Thread Size 1/4 In. -18, NPTF, Overall Length 2 7/16 in, Cobalt, TiN, Right Hand, Thread Length 1 3/32 in, 75 Percent Thread Drill Size 0.4375 in, Number of Flutes 4. This item has been restricted from sale in the following state (s): []