DIN 6923 flange nut, M5, with certificate, Article number 69231005ZNB-12. Property class / material: steel class 10, surface finish zinc-nickel, black. Flange Nut manufactured to DIN 6923 with ISO metric (M) thread, coarse pitch, fully threaded. 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.