Philidas was established in 1942 by Philips and Dundas, the original patentees of the steel all metal self-locking nut.

1942 Patent
1952 AID Fully Approved
Goodbye to all these
1953 Flight Magazine
1952 Rover Advert
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Philidas design and manufacture self-locking nuts and specialist fasteners for industrial, automotive, and domestic applications.

For quality, safety, reliability, consistency, and performance - Choose Philidas Fasteners.


Philidas has manufactured its range of products in the UK since 1942, and from the same 90,000 sq ft site in Pontefract, since 1960.

Bulk manufacturing is by cold forming (sizes up to M20) , with larger or more specialist parts being bar turned.

Parts are produced in various materials including: Steel, Stainless Steel, Brass, and aluminium.

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