M3 Nuts, Bolts & Washers

Secure lightweight fixtures and precision components with our range of M3 fixings. Designed for smaller scale applications such as electronics, modelling, and light machinery, these 3mm metric fasteners deliver a reliable hold where accuracy is paramount. Whether you are assembling detailed equipment in the workshop or carrying out maintenance on intricate systems, our M3 range ensures a robust connection that stands up to the demands of the job.

Our selection features specialized nylon lock nuts, engineered to resist loosening caused by vibration and torque. Finished with a durable zinc plating, these fixings offer essential protection against rust and corrosion, making them suitable for both indoor and sheltered outdoor tasks. Rely on trusted trade brands like FandF to provide the consistency and quality you need to complete every project efficiently.

 

Frequently Asked Questions | FAQs

What size is an M3 nut?

An M3 nut has a nominal thread diameter of 3mm. It is a standard metric coarse thread used commonly in electronics, small machinery, and precision engineering where a compact but secure fastening is required.

What spanner size do I need for M3 nuts?

Standard M3 hexagon nuts typically require a 5.5mm spanner or socket. Always check the specific head dimensions of your fixings, as nylon lock nuts or specialized variants may occasionally differ.

What is the benefit of a nylon lock nut?

Nylon lock nuts feature a nylon insert that grips the bolt thread as you tighten it. This increases friction and prevents the nut from loosening under vibration or movement, making them ideal for machinery or motors.