This self-locking hex nut, also known as a lock nut, features a nylon insert that acts as a non-metallic locking element. This built-in design helps prevent the nut from loosening due to vibration or mechanical stress. Made from stainless steel (A2), it meets DIN 985 and ISO 10511 standards and comes with metric threading. Please note: stainless steel self-locking nuts are prone to thread galling, which can increase the risk of product failure. We recommend treating these nuts with a friction reducer or applying an anti-seize paste before installation.