603431 | M12 Fuel Pipe Union Nut - 2.5 NA Diesel, 3.5 V8 | Defender, Series 2/3
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: 603431 - M12 Fuel Pipe Union Nut
603431 is a M12 fuel pipe union nut used to secure and seal fuel pipe fittings on 2.5 NA Diesel, 4-cylinder carburettor petrol and 3.5 Twin Carb V8 engines. Fitted at the junction of fuel pipes and unions, this nut tightens onto the mating fitting to form a pressure-tight connection; check for corrosion, damaged threads or leaks when servicing the fuel system.
Compatibility
- Defender (1987-2006) - 2.5L 4 Cylinder Diesel
- Defender (1987-2006) - 3.5L V8 Twin Carb Petrol
- Defender (1987-2006) - 4 Cylinder Carb Petrol
- Series 2 and 3
Frequently Asked Questions
603431 is a M12 fuel pipe union nut that secures and seals fuel pipe unions on the listed engines, creating a pressure-tight connection. Inspect the nut for corrosion, damaged threads or leaks when the fuel system is serviced and replace if any defects are found.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | 2.5L 4 Cylinder Diesel |
| Land Rover Defender (1987-2006) | 3.5L V8 Twin Carb Petrol |
| Land Rover Defender (1987-2006) | 4 Cylinder Carb Petrol |
| Land Rover Series 2 and 3 | - |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Inspect the union nut whenever the fuel system is serviced; replace it if it shows signs of corrosion, damaged threads, deformation or if it is leaking. If the sealing face or threads are compromised, do not reuse the nut.
- C8 products are usually supplied by Britpart.
- L8 products are genuine Land Rover parts.
All products and accessories available on LRDirect.com come with a 2-year warranty.