Material : J55,K55,N80,L80,P110
Technics : hot rolling
Type : Coupling
Connection : EUE*NUE,PIN*PIN,PIN*BOX
Shape : Equal
Head Code : round
Standard : API 5CT&5B
Size : 1.9 inch to 4-1/2 inch
Thread type : NUE*EUE,PIN*PIN,PIN*BOX
Surface treatment : phosphating or outside blueing
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