Buy diesel spares online from Darwen Diesels

Banjos, Bolts, Fittings etc


  • Leak Off Fittings

    At Darwen Diesels we stock a full range of leak off fittings and banjos that are compatible with both Zexel, Denso, Bosch, Delphi (C.A.V.) and VDO (Siemens/Continental) injection systems.

    Our leak off fittings include pipe connectors, inserts and olives all available in metric and UNF (Imperial) sizes. Fir tree, straight, 90 degree, T and Y shaped connectors are all available for fitting to both pipe and filter assemblies. We also keep single, double and triple leak off banjos suitable for Denso or Zexel injectors.

    Zexel is the Brand name from Bosch Automotive Systems and Denso supplies a wide variety of engine management systems and components for diesel injection engines. Denso are also famous for having launched the world’s first common rail system.

    We have leak off banjo fittings in single, double and triple configurations. We have Common Rail 180 degree leak off Connectors to fit Siemens, tee connectors to fit 3mm leak off pipes with 3/16" connections.

    The leak off banjo bolts we stock are manufactured to the highest standards, and precision engineered. We pride ourselves on being the UK’s leading supplier of diesel engine components and assemblies, if you are unable to find a part in our database please don’t hesitate to give us a call. Out highly trained and experienced sales/technical team will be happy to help you to source the part you need.

Showing 1 - 12 of 12 items
Showing 1 - 12 of 12 items

A banjo fitting - also known as an internally relieved bolt – is essentially a hollow bolt that is perforated with a spherical union. This is for fluid transfer. They are often to be found in hydraulic systems such as the brakes and the clutch, and in fuel and motor oil systems too. Banjo bolts are used in cars and commercial vehicles as well as plant, marine and agricultural applications.

If you are servicing or doing major work on an engine, there will undoubtedly be a need for replacement fittings such as banjo’s and bolts as they often wear and threads have become stripped. We have a very comprehensive range of just about any fitting you might need to service or work on your diesel engine.

We have banjo fittings and bolts for a wide variety of manufacturers and applications. We have numerous types of banjo fittings and bolts for Bosch, CAV/Lucas, Simms and Denso pumps. We also have all the fittings you are likely to need for lift pumps, filter assemblies and fuel line connections.

In addition, we have in stock almost every type of aluminium non- return valve in a broad range of sizes, both with and without filters.

We have a comprehensive range of sizes of injector pipe nuts and olives, which are available in brass, plain, stepped, and plated versions.

Test bench pipe, injection pipe, high-pressure steel pipe, emergency fuel pipes, leak off tube, and supply hoses are also in stock with various differing lengths and diameters.

Our range of banjo fittings, bolts, connectors and pipes, can be found on this website, but if you are unable to find your specific part please call us and speak to our sales or technical team and we will do our very best to help you locate what you need.

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Call Darwen Diesels on +44 (0)1254 53545

We can source virtually any diesel part!

Or send us a message via our contact form and we will get back to you

  • We hold vast stocks of OE and quality replacement parts
  • We can source virtually any diesel part
  • The largest UK independent distributor of Diesel Fuel Injection components
  • We export our products to worldwide destinations
  • Next day delivery

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Overseas Orders

For orders to be delivered outside of the UK, please contact us or send us a message so we can quote for delivery.