... J55, K55, N We supply all sizes and grades of casing and tubing, both Seamless and ERW.Manufacturing methodCold Drawn or ... , L80-1, L80-9Cr, L80-13Cr , C90, T95, P110, Q125 API Connections Round thread(8tpi, STC and LTC), Buttress thread (5tpi ... ; For extra clearance applications Special bevel; 20° bevel Slotted (Screen casing)Flush JointMacaroni tubing 1.05”, 1.315”, 1.66”Resilient ...