Hand Tap, Bottom, General Purpose, High Speed Steel, Plain Finish, 4 Flutes, Size 3/4, Pitch 16, UNF, Thread Length 2 In, Overall Length 4-1/4 In, 1-2 Pitches, Pitch Diameter Limits H5, Shank Dia 0.590 In, Use With Machine or Tap Wrench For Inside Thread Producing, ANSI Standards