DIN 7980 spring lock washer, 4.1 x 7 x 1.2 mm, Article number 7980PB041. Surface finish: plain. Spring Lock Washer manufactured to DIN 7980. 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.