... TiN, TiCN, Al2O3, TiALN4,Application: J55, N80, P110Our Carbide API Inserts are used for machining casings, tubings, leadout pipes, drill ... security and convenient clamping, finished teeth ground to a "narrow" API tolerance and excellent cutting performance.The multi-layer-coating ... inserts in China, we can offer you a complete line of API threading Inserts for your application.Our customers are ...