DIN 2093 conical washer, 30.5 x 70 x 3 mm, Article number 20933057030GEO500B. Property class / material: 42 - 52 hrc, surface finish zinc flake, silver. Conical Washer manufactured to DIN 2093. Standard parts to the same standard, property class, dimensions and surface finish are interchangeable between manufacturers; confirm the controlling standard revision, any class-society or application approval, and the mating thread before substitution. Applications: load distribution and locking under bolt heads and nuts in machine building, structural steel, plant maintenance and marine outfitting.