Afnor Contact Lock Washers – NF E-25 511

Contact Washers are Conical shaped Lock Washers formed with a ribbed top surface. The conical shape exerts locking force 360 degree around the underside of the screw head/ nut by generating tension.

The ribbed top surface further enhances the locking force and resists the torqued fastener connection potential for loosening under pressure and vibration.

This is a single-sided toothed and non-slip locking washer, providing the designer the ability to secure wobble-prone screw effectively. It is particularly suitable for use on slot fasteners, dynamic cross-loaded to the screw connections and applications that require high biasing forces.

These washers are widely used in locomotives, appliances, elevators, electrical towers, medical machinery and electronic equipment.