Lockwasher nordlock nl

Lock washer Nord-Lock In accordance with DIN 25201. Acid-resistant material equivalent A4-quality.
Nord-Lock consists of pairs of pre-assembled washers with combs on an incline on one side where the comb angle is greater than the angle of the thread increase and there are radial teeth on the opposite side. The washers are always mounted in pairs with the comb sides towards each other.

When the screw/nut is tightened, the Nord-Lock washer grips the opposite surfaces, allowing movement only movement along inclined combs. Each attempt to unscrew a screw/nut will be effectively blocked by the kill locking that will take place.
The Nord-Lock safety washers have an outer diameter adapted for recessed holes as standard. In addition, there are washers with enlarged outer diameters (SP) for use with large/oblong holes, painted surfaces or soft materials such as aluminium. Use Nord Lock SP washers in combination with the flange screw/nut for maximum load distribution.

Nord-Lock screw fusing system can also be used for high strength screws/nuts. Straight through holes require two pairs of washers, both under the head of the screw and under the nuts. Nord-Lock also effectively secures the nut to the stud bolt and eliminates the need for locking fluid.