Interesting research about fixing nuts. The Nordlock Locking Washers

Here are a few types of washers commonly used for fixing nuts, including Nord-Lock:
Flat washers
Lock washers
Spring washers
Tooth lock washers
Split washers
Belleville washers
Fiber washers
Sealing washers
Nord-Lock washers
Nord-Lock washers are a type of locking washer that provides a secure and vibration-resistant fastening solution. They work by creating a wedge-locking effect between the washer and the bolt/nut, making it difficult for the fastener to loosen over time.