Spiral Flute Tap, #4-40, Bottoming, 0 Flutes, UNC
Spiral Flute Tap, Thread Size #4-40, UNC, Overall Length 1 27/32 in, High Speed Steel, TiN, Thread Length 5/16 in, 75 Percent Thread Drill Size 2.20, Thread Limit H2, Thread Direction Right Hand, Number of Flutes 2.