... pipe joint Surface protect:Oil Machined and turned SGS audited More than 20 years experience in special fastener 1,Name:Steel pipe ... joint;Pipe joint;Steel joint2,For the similar joint,what can ... .8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr.D,Gr.36,Gr.58,1010,1015,1016, ... hardware fastener ,especially the cutting/turning parts. Steel pipe joint