Plating: color zinc plating, white zinc plating, blue zinc plating, black zinc plating, phosphated, dacrotized, ruspert, xylan,Epoxy 800 hour salt spray per ASTM B117, 15/15 Kesternich per FM 4470,Cathodic epoxy e-coat etc.Washer :PVC washer, nylon washer, EPDM bonded washer, EPDM washer, nylon cap