Male threaded hex union Surface :Plain Machined and turned SGS audited More ... fastener 1,Name: Male threaded hex union;Hex union;Male threaded union2,For the similar union,what can we do ?(1), ... Ability for the material of this kind of union:Grade3.6,4.6,4.8,5.6,6.8 ... steel4130,4140,G51150,etcStainless steel201,202,301,302,303,304,316,310,430,etcBrassC28000,C37710,C3450,C27200,etcBronzeC51900,C60600 ...