... 4 TPI, 5 TPI, 8 TPI, 10 TPI,2,Thread: ROUND THREAD, BUTTRESS THREAD3,Coating: TiN, 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 ...