This all-metal self-locking hex nut, manufactured to DIN 980V and ISO 10513 standards, features a built-in locking mechanism that helps prevent loosening caused by vibration or mechanical stress. Made from grade 10 steel, it's designed for use with bolts and screws of property class 10.9 or lower. This version comes with a metric fine thread (MF). The electro-galvanized finish is intended for indoor applications or environments with very mild exposure conditions.