... washer in carbon steel, stainless steel,brass Washer/Fastener/HardwareSpecialiation : according the drawing from clientsSurface : plain ,zinc plated ,hot-dip galvanized ,hardenedMaterial ... steelPacking : Two kind of packing for youBulk and small box,or according your requirmentsStandard:DIN125A,DIN125B ,DIN126,DIN433,DIN449 ,DIN1440,DIN1441,DIN6916,DIN7349 ...