Spiral Flute Tap, 1/4-28, Bottoming, UNF, 3 Flutes, Bright
-28, UNF, Overall Length 2 1/2 in, High Speed Steel, Bright (Uncoated), Thread Length 5/8 in, 75 Percent Thread Drill Size 5.45mm, Thread Limit H3, Class of Fit 2B, Thread Direction Right Hand, Number of Flutes 3.Spiral Flute Tap, Thread Size 1/4 In.