... Couplings Std Ref: API 5CT and 5B Descriptions and sizeType of ThreadO.D*L(mm)Weight(kg)Tubing Coupling2-3 ... wooden case, wooden pallet, or by requirements of customers Our company manufacture and sell casing and tubing couplings,pup joints, tool joints, adapter ... pup-joints, adapter couplings, stabilizers, air-liquid separators, anchors of oil pumps and revolving sand gravitated device, etc. Tubing ...