API 5B Tubing and casing thread Standard: ASTM,JIS,EN,ISO,BS,GOST, ... T.: 2mm-200mm API 5B Threading, gaging and thread inspection of casing, tubing and line pipe thread ASTM A519 50B40 50B44 ... J, STO-N,STO-C, STO-D, STO-EJIS G3441 SCr 420TK, SCM415TK,SCM418TK, SCM420TK,SCM430TK, SCM435TK,SCM440TKJIS G3444 STK ... CONTACT US IF ANY INQUIRY! API 5B Threading, gaging and thread inspection of casing, tubing ...