DIN 432 external tab washer, 31 mm, Article number 432A2310. Made in stainless steel a2. External Tab Washer manufactured to DIN 432. 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.