1,carbide grade:GY03 GY01 2,threading form: round & ... TiCN, Al2O3, TiALN4,Application: J55, N80, P110Our 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 ... machines.As a majore and professional manufacturer of carbide oil threading inserts in China, we can offer ...