Lock Nut

Lock nuts are fasteners that provide a reliable threaded connection and prevent the bolt from loosening spontaneously during operation. Over time, all such fasteners are prone to this effect, and the locking element solves this problem.

Product features

In appearance, these nuts do not differ from other similar products — they are metal fasteners of hexagonal, round or square shape with an internal thread. The main feature is hidden inside the cavity: there is a plastic ring that functions as a lock and keeps the connection from loosening over time.

Lock nuts are made of zinc-plated steel. The zinc coating provides corrosion resistance. Size range: internal diameter 10–100 mm, external diameter 20–130 mm.

Application and installation rules

Installing a lock nut is no different from installing a regular one — it is placed on the bolt and tightened with a wrench. The lock engages automatically as it winds onto the bolt thread. Such connections are in demand, for example, in mechanical engineering.

Lock nuts are also used in plumbing work — there they are screwed not onto bolts, but onto pipes with external threads.