28Tpi Full Profile Guhring Whitworth I.D. Thread Rh System 104 Insert, 17Mm Reach, Nano-A Coated 28Tpi, 17Mm Reach, Right Hand Gg104.Vw28.091.17.43.R, Nano-A Coated Type Gg104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Full Profile Whitworth Pipe Threads. Guhring Series No. 25182 Order Code 4.001 Made In Germany, Guhring Part #9251820040010 Guhring Inc.