1,carbide grade:GY03 GY01 2,threading form: round & buttress 3 ... ,Coating: TiN, TiCN, Al2O3, TiALN4,Application: J55, N80, P110Our Carbide API Inserts are used for machining casings, tubings, leadout pipes ... machines.As a majore and professional manufacturer of carbide oil threading inserts in China, we can offer you a complete line ... are ranging from steel tube plants to oil fields. Carbide API Inserts