RIPP LOCK® self-locking washers are ribbed on both sides. They are available in standard diameters or reduced outer diameters. Both washer versions are available in steel (hardness value: 400-500HV) with zinc flake coating and stainless steel A4 (hardness value: >=800HV). The detent edged washers' high hardness properties mean that they can be used with screws of all strength classes up to 12.9
The standard version has an outside diameter in accordance with DIN 125/ISO 7089. The RIPP LOCK® self-locking washer with reduced outside diameter is suitable for screws with a counterbored zylinder head.