... couplings,pup joints, tool joints, adapter pup-joints, adapter couplings, stabilizers, anchors of oil pumps and revolving sand gravitated device of ... of API standard for thread also.Grade,J/K55,L/N80,P110Thread, BTC,LTC,STC.Size of Tubing , 2 3/8 " - 4 1/2"Outside ... diamete, 60.32 – 114.3mmWall thickness,4.83-6.88 mmEUE,NUESize of Casing ,4 1/2 "- 20 ...