nylon washers 1.Delivery time:7days 2.OEM:manufacturer 3.ISO9001:2008, ROHS 4.ISO,GB,DIN,JIS,ANSI Original of Placeshenzhen ,ChinaMaterialCarbon steel ,stainless steel, brass, nylon and etc.Standardstandard fasteners (GB, DIN, ANSI,JIS AND ) and non-standard. Certification ISO:9001SurfaceBlack, White or Blueness Zinc (Cr.3 or Cr.6), Yellow Zinc, Dacromet, Hot Dip Galv, Nickel Plating, ...