1,carbide grade:GY03 GY01 2,threading form: round & buttress 3,coating:TiN TiALN AL2O3 TiCN 4,for oil ... ,Specifications: 4 TPI, 5 TPI, 8 TPI, 10 TPI,2,Thread: ROUND THREAD, BUTTRESS THREAD3,Coating: TiN, TiCN, Al2O3, TiALN4,Application: J55, N80 ... , oil suching rods, separators, V-thread and buttress thread for oil industry as well as gas thread for geological applications in standard or ...