High speed steel ground threads tmx hand tap with straight flutes – available in three chamfer styles: taper chamfer has 8-10 thread chamfer length, plug chamfer has 3-5 thread chamfer length and bottoming chamfer has 1-2 thread length. m6.0 x .50 d4 bottoming chamfer iso metric hss tmx hand tap, ground, rh, 4 flutes. iso metric taps with ansi shanks