S 0.9 Tap Roll form bottoming; HSS w/TiN pitch .225mm threading length approximate 4.0mm /0.160”, 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. 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. Image is representative of the item for sales. Overall length of Tap is 25mm (0.984") 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. Taps: ISO 1501 “S” Metric System Right Hand size "S 0.9" to Horological (watch) series N.I.H.S. 06-02 Please not this item is typically a special order we have very limited stock Class ISO2 (3G) 2 Pieces and ISO 1 (4H) 1 piece please contact us for more.