DIN 127-B spring lock washer (form B), 7.1 x 12.8 x 1.6 mm, zini, tran, Article number 127071ZNF105. Property class / material: steel 420-490 hv, surface finish zinc-nickel, silver. Spring Lock Washer manufactured to DIN 127. 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.