... W.T.: 2mm-200mm API 5B Threading, gaging and thread inspection of casing, tubing and line pipe thread ASTM A519 50B40 50B44 50B46 ... , WStE420, TStE420, EStE420,StE460, WStE460, TStE460, EStE460DIN 28180 St37.0, St35.8, TTSt35N,15Mo3, 13CrMo4 4JIS Steel Pipes StandardStandard GradeJIS ... CONTACT US IF ANY INQUIRY! API 5B Threading, gaging and thread inspection of casing, tubing and line pipe thread