... experience in special fastener Name: hex nut with internal thread and castle screw Ability for the material of this ... ElectroplateZinc plated(while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic ... way to supply youthe high quality products with lowest price and delivery on time as we can. ... avoid lots ofrisks. hex nut with internal thread and castle screw