Tap, 00-90 American National Standard, class 2 : 3 flute Bottoming, style with TiN coating threading length approximate 0.170" (4.0mm), Shank 0.060" made from hardened high speed steel our taps are designed for production taping in Automatic screw machines, Tappers, CNC lathes and CNC mills. Image is representative of the item for sales. The coating used TiN (Titanium Nitride) very thin and smooth, increases tap performance and tool life. In our shop TiN coated taps typically tapped three times the number of holes. Overall length of Tap is 25mm (.984") threaded length (tip to end of thread) 4.0mm (0.160") lengths can vary slightly between batches. Price listed is for 1 to 9 pieces.