Spiral Flute Tap, 5/16-18, Plug, 3 Flutes, UNC
-18, UNC, Overall Length 2 23/32 in, High Speed Steel, TiCN, Thread Length 5/8 in, 75 Percent Thread Drill Size F, Thread Limit Not Rated, Class of Fit 2B, Thread Direction Right Hand, Number of Flutes 2.Spiral Flute Tap, Thread Size 5/16 In.