pipe tubing and couplings: 1)O.D.2-3/8", 2-7/ ... ,R3 3)Grade: J55, N80, L80, C90, T95, P110 pipe tubing and couplings 1)Size: O.D. ", 2-3/8", 2 ... ,R3 5) Thread: 8RD and 10RD 6) All our Tubing accord with API SPEC 5CT standard, and we get the right to ... use the API 5CT . ODWall thicknessMassIDEndsGradeinchmminchmmKg/mlb/ftmmNU,EUJ55,L80,N80,C90,T95P1102 ...