This self-locking hex nut with a nylon insert is made of steel and manufactured to DIN 985 and ISO 10511 standards. It's a lock nut featuring a non-metallic locking element in strength class 5, commonly paired with class 5.6 or 5.8 fasteners for pressure vessel applications. The nut has a metric thread and an electro-galvanized finish, making it well-suited for indoor use or environments with very mild exposure. Sold in bulk packaging.