DIN 472 retaining rings for bores, 20 x 1.0 mm, Article number 472020. Property class / material: steel, surface finish plain. Retaining Rings for Bores manufactured to DIN 472. 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: axial location of bearings, gears and shafts in machine building, plant maintenance and marine equipment.