... oil wellhead assembled of gauge bull plug, tree cap,threaded nipple,top connetctor,valves,cross and spoolNB:2 ... /16" 3-1/16" etc wellhead xmas tree cap flangerated wp:14-140Mpa wellhead christmas treenorm : design ... adapter spool,gate valve,choke valve and the tree cap. All wellhead tree manufctured by our fty are ... threaded nippe,solid bull plug,tree cap,cap flange,top connector, valves,cross and spool