... than 20 years experience in special fastener 1,Name:Steel pipe joint;Pipe joint;Steel joint2,For the similar joint,what can we ... plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic oxidation,etc Dip plating black oxide coating,hot dip galvanizing,etc ... plating Light oil,spray coating,electrophoretic coating,etc Polishing Grinding and polishing,etc,except mirror finish (3),Ability for the tolerance ...