... API 5CT Grade:J55,K55,N80,L80,C90,P110, N80-1,N80-Q Type: NU, EU Coupling Manufacturer of Tubing and Casing coupling according to API ... SPEC 5CT ... /2"EUE141.30*158.756.051.Grade:J55, K55, N80-1, N80-Q, L80, ... gravitated device, etc API 5CT tubing and casing coupongs oil pipe coupongs