... 4.Black Oxide,Zinc plated. washers 1. Standards1. ISO, DIN, AS/NZS, GB, ANSI and BS2. Material2. Stainless steel, ... once8. Surface treatment8. Passivation,Galvanized,dacromet ,black chromium, and according your requirement9.Packing9. Bulk(25kgs/carton) or small ... ' requirement)10.Usd fields10. construction industry, furniture fields and other public equipment11.MOQ11.50PCS Zheng An Industry (Hong ...