... ,Aluminum and so on;Grade:Grade 4.8,5.8,8.8Diameter:3mm-52mm 1/4"-3/4",3/16"-2"Threaded rod ... . The product materials have carbon steel,alloy steel,stainless steel,brass and aluminum,the surface treatments have ... blacked,zinc,copper,hot dip zinc,mechanical plated.Years of threaded rod export experience make our threaded rod popular ...