DIN 125-A round flat washer (form A), 15 x 28 x 2.5 mm, Article number 125150HV200. Property class / material: steel 200 hv, surface finish plain. Round Flat Washer manufactured to DIN 125. 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.