DIN 934 hexagon nut, M16, en 10204 3.1 certificate, left-hand thread, Article number 934L161C. Property class / material: steel class 8, surface finish zinc plated. Hexagon Nut manufactured to DIN 934 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.