... TiCN, Al2O3, TiALN4,Application: J55, N80, P110 Our Carbide API Inserts are used for machining casings, tubings, leadout pipes, drill ... rod connectors, oil suching rods, separators, V-thread and buttress thread for oil industry as well as gas thread ... They feature a rigid security and convenient clamping, finished teeth ground to a "narrow" API tolerance and excellent cutting performance.The ...