DIN 6796 conical washer, 17 x 39 x 4 mm, Article number 67961701M. Property class / material: steel 420-490 hv, surface finish mech zpl. Conical Washer manufactured to DIN 6796. 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.