... form: round & buttress 3,coating:TiN TiALN AL2O3 TiCN 4,for oil pipe and drillrod 1,Specifications: 4 TPI, 5 TPI, 8 ... , TiALN4,Application: J55, N80, P110Our Carbide API Inserts are used for machining casings, tubings, leadout pipes, drill rod connectors, oil suching ... can offer you a complete line of API threading Inserts for your application.Our customers are ranging from steel tube plants ...