Plain ss thread bar Surface :Plain Machined and turned SGS audited More than ... 1,Name: Plain ss thread bar;SS thread bar;Plain thread bar2,For the similar threaded bar ,what can we do ?(1 ... ), Ability for the material of this kind of thread bar: Grade3.6,4.6,4.8,5.6,6.8 ... black oxide coating,hot dip galvanizing,etc Flame plating Light oil,spray coating,electrophoretic coating,etc Polishing Grinding and ...