... experience in special fastener 1,Name: Carbon steel end core with rohs zinc plated ;Carbon steel end core;End core with rohs zinc ... for the surface finish: ElectroplateZinc plated(while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic oxidation,etc Dip plating black ...