Flat washer,washer: 1)DIN125,DIN9021,DIN433,DIN6916 2)From M1. ... to M40 3)Carbon steel,stainless steel,brass 4)Carton Flat washerSurface treatment: Zinc coat(CR3),Zinc coat(CR6),Yellow zinc ... forward to work with you Usage: Our products are widely used in aerospace,automobiles,motorcycles,agricultural machinery,construction,transportation, electric power ...