Westward 5TWN3 Spiral Point Tap Features The coating on these taps protects them from wear and allows them to be used at higher speeds than taps with a bright finish. Thread Size / M8x1.25 Thread Standard / Metric Coarse Tap Material / High Speed Steel Tap Finish / TiN Thread Length / 1-1/8 inch Overall Length / 2-23/32 inch Thread Limit / D5 Class of Fit / 3B Thread Direction / Right Hand Primary Material Application / All Materials Coolant Fed / Non-Coolant Through Drill Bit Size / 6.70 mm Material Grade - Machining / M2 Measurement System / Metric Shank Dia. / 5/16 inch Shank Type - Machining / Straight Square Size / 0.2380 inch Standards / ASME Tap Chamfer / Plug Tap Thread Size / M8x1.25 Thread Limit / Class of Fit / D5 / 3B