Spiral Flute Tap, Thread Size 3/8 In.-24, UNF, Overall Length 2 15/16 in, High Speed Steel, Bright (Uncoated), Thread Length 1 1/4 in, 75 Percent Thread Drill Size 8.50, Thread Limit Not Rated, Class of Fit 2B, Thread Direction Right Hand, Number of Flutes 3.