Features The bright finish on these taps provides a smooth, polished surface. Thread Size / M18x1.5 Thread Standard / Metric Fine Tap Chamfer / Bottom Tap Material / High Speed Steel Tap Finish / Bright (Uncoated) Thread Length / 1 13/16 in Overall Length / 4 1/32 in Thread Limit / D7 Thread Direction / Right Hand Number of Flutes / 4 Coolant Fed / Non-Coolant Through Drill Bit Size / 41/64 in Material Grade - Machining / M2 Measurement System / Metric Primary Material Application / All Materials Series / 311-4423 Shank Dia. / 17/32 in Shank Type - Machining / Straight Square Size / 0.4060 in Standards / ASME Tap Grouping / Individual Tap Style / Straight Flute Thread Limit / Class of Fit / D7 Thread Pitch / 1.50mm