This all-metal self-locking hex nut, also known as a lock nut, features a built-in locking mechanism that helps prevent loosening caused by vibration or mechanical stress. Manufactured to DIN 980-V and ISO 10513 standards, it's made of steel with a metric fine thread. Its 8-grade strength rating makes it suitable for pairing with bolts and screws of grade 8.8 or lower. The electro-galvanized zinc coating is designed for indoor use or applications with only very mild environmental exposure.