Serrated Washers are Disc Springs with Trapezoidal Cross part on both sides for gripping. IIS serrated security washers are prepared to fit washers to sustain preload and keep away from loosening. As the bolt is tightened the serrations crunch into the mating faces and prevent the screw from loosening up due to vibration.
Also, the disc shape holds the necessary tension. They are available in many sizes to fit bolts or screws. The diameters for Serrated Washers are go with to screw dimensions. The outer diameter of the washer is matched to the main diameter of the screw head. This allows using screws and bolts including recessed heads, except countersunk screws.
Use for top vibration resistance due to positive rib contact
Extensive application and flexibility minimize stocks.
The concentric force of the washer eliminates the possibility of bending the fastener.