... : galvanized Item No.: HY05-074 Use: Industry certification: ISO9001, CE Screw & Nut Item No.:HY05-074 certification:ISO9001;CE feature:1).corrossion ... steel, aluminum, brass, aluminum alloy,surface treatment: zinc plating , galvanized, chrome plating , nickle plating, sliver plating , gold plating , sand blasting , lacquering ...