... -0.010usd/pcs pan head goggle-box screw customized chrome plating china manufacturer A.Product specifications 1.StandardGB9074.3, ... nickel plating, chromate plating, passivated, HDG, Dacromet.5.Salt spray time2 hours, 24 hours, 48 hours, 96 hours, 1000 ... 100% Whole range inspection through the production. 3. Inspection equipment:Hardness test, torque test, salt spary endurance test, mechanical sizes ...