... API 5B Tubing and casing thread Standard: ASTM,JIS,EN,ISO,BS,GOST,API O.D.: 5mm-1500mm W.T.: 2mm-200mm API ... 5B Threading, gaging and thread inspection of casing, tubing and line pipe thread ... JIS G3429 JIS 3445...DIN 1630 DIN 17175...API 5CT OCTG seriesCasing:K55 M65 N80-1 N80Q ... US IF ANY INQUIRY! API 5B Threading, gaging and thread inspection of casing, tubing and line pipe thread ...