... N We supply all sizes and grades of casing and tubing, both Seamless and ERW.Manufacturing methodCold Drawn ... -rolled Seamless, ERW, LSAW ERW, Hot-rolled and cold-rolled Seamless Size (OD)4 1/2 ... T95, P110, Q125 API Connections Round thread(8tpi, STC and LTC), Buttress thread (5tpi, BTC) Non upset ( ... NUE), External upset (EUE), Round thread (8RD and 10RD) Premium Connections HSM, TP-CQ, RJS (compatible ...