Piece Bolt and Nut Assortment Kit Stainless Steel Bolt and

Stainless steel NF locking threaded nuts: The teeth of the lock washer bite into the surface and help lock the nut in place. Lock nuts.
Nut hardware: The nut has an attached external serrated washer that, when tightened, provides a locking action. Joint fixing.
Hardware nuts: Lock nuts are highly resistant to wear, ideal for indoor and outdoor use. Hex nuts.
Nut fasteners: This lock nut has a built-in external serrated lock washer for free rotation. Lock nut.
Lock nuts: Stable characteristics, high performance and great reliability, simple and easy to install. Hex lock nuts.