GREENFIELD THREADING 174505 Tap Set, 1/2"-20, Bottoming, Plug, Taper, 4 Flutes,
$61.65
Tap Set, Tap Thread Size 1/2 In.-20, High Speed Steel, TiN, Thread Standard UNF, Thread Length 15/16 in, Overall Length 3 3/8 in, Thread Limit 2B, Class of Fit 3B, Thread Direction Right Hand, Number of Flutes 4