Locking Nuts

Locking Nuts - Standard and Bespoke Solutions in the UK

What are Locking Nuts?

A specialized fastener intended to resist loosening under vibration, torque, or shock. They provide permanent or semi-permanent fastening by creating friction through deformed threads or inserts. Used for machinery, vehicles, and structural applications.

Key Types of Lock Nuts that Masons Supplies are

Nylon Insert/Prevailing Torque: Features a nylon insert or distorted threads, crimped tops to create constant, or "prevailing," torque. that deforms over the bolt threads, creating friction to lock it in place.
Half Nut (also known as Jam or Lock nut): A thin nut (half the thickness of a standard hex nut) used in combination with a standard nut to lock it into position.

Available in metric and imperial all in different diameters, finishes and materials including stainless steel, self-colour, zinc, black, brass.

If your item is hard to find, unusual or special? Explore our Special Fasteners service for custom nuts made to order.
Alternatively, Contact us with your request, we’ll be happy to source for you!