This PAL self-locking hex nut, also known as a lock nut, is manufactured to DIN 7967 standards and features a built-in locking mechanism that helps prevent loosening caused by vibration or mechanical stress. Made from spring steel with a plain finish, the nut has no coating or surface treatment, meaning it offers minimal corrosion resistance on its own. It comes with metric threading. Please note: electrolytic treatment of this product may cause hydrogen embrittlement.