Diesel & Adblue® Filler Cap Specialist
Alloy, Steel & AdBlue® filler necks
We supply stainless steel, mild steel, AdBlue® and aluminium alloy filler necks. With or without caps.
Lockable Adblue® filler tank caps
Comprehensive range of locking AdBlue® tank caps for Commercial Trucks and Vans.
Heavy/Plant Machinery & Generator fuel caps
Lockable fuel tank caps for Komatsu, Manitou, Merlo and small plant generators.
Agricultural/Farm machinery fuel caps
Suppliers of lockable fuel caps for Deutz-Fahr, Same and Case farm machinery.
Wholesalers; Order filler necks & caps in bulk
We offer bulk ordering of fuel caps and necks as well as filler necks with matching fuel caps. Contact us.
Motorhomes, Classic Cars & Easy-fuel Capless kits
Lockable full-chrome petrol caps for classic cars, easy-fuel capless kits and fuel caps for motorhomes.
why customers buy from us
Quick, Easy & Secure Ordering - Home or Office Delivery
Pay using any major credit/debit card or, use your PayPal account. Orders are dispatched and a tracking code emailed to you within 24 hours. And, all our UK prices include delivery.
Home or Office, it’s the same price, sent by Royal Mail Track 48 or DHL Express.
Lifetime Replacement Guarantee on all fuel caps
Every fuel cap sold by The Fuel Cap Company is manufactured to OEM standards by our partner in Italy. Our confidence in the quality of our fuel caps means each one comes with a Free Lifetime Replacement guarantee for your peace-of-mind.
It’s a guarantee we think you’ll find hard to beat.
A Partner with 50 years of engineering excellence
Farma Srl are an Italian design and engineering company. Founded in 1975 they have built a global reputation for precision engineering and innovation.
A reputation that has them trusted by motor manufacturers to produce OEM products for their vehicles.
Driven by Happy Customers
Absolutely amazing service!
Adrian | UK
I used the Snap and Send feature (on a Sunday) to check I was ordering the right fuel cap & Mark replied within minutes! The fuel cap arrived within 2 days of ordering and fits perfectly. I wouldn’t hesitate to recommend the Fuel Cap Company to anybody.
Mark was quick to reply to my questions
Jacqueline | FR
Mark was quick to reply to my questions. Mark was quick to reply to my questions and the new cap arrived on time and fits perfectly. Great service, thank you.
First class service all round
Mark Edward Harrison | UK
First class service all round. Spoke with Mark sent a photo of fuel tank neck. Mark told me which cap I needed. Ordered came two days later. What more can you ask for. Fits a treat. Good old customer focus & advice. Great service.
Fast delivery, super service, professional
Reno | UK
My fuel cap for my Nissan qashqai was delivered a day early, all ordered online and very professional service.
The Fuel Cap Company experience was ...
Paul27 | UK
The Fuel Cap Company experience was excellent. Mark (the owner) was extremely helpful and identified the fuel cap needed for my 1997 campervan right away. He couldn’t have been more helpful and I wish him well in his business. This is a great firm and vital for anyone who needs fuel caps. Very best wishes Paul27
total knowledge on fuel caps
Franics | UK
Ordered, my replacement fuel cap from mark. Very helpful and we had a nice chat. Took my cap and it fitted perfect why buy from a main dealership, it arrived as stated within 48 hours. Thank you for your prompt service.f Armstrong.
Getting businesses back on the road
Dispatched: AUDI A5 Sportback (Aug 2009 onwards)
£21.99 (inc. UK Delivery) - In Stock
DC179 - Shipped on 29-Dec-2025 to Philip fully tracked and with a Lifetime Replacement Guarantee.
Dispatched: LAND ROVER Freelander 2 (L359)(2006 onwards) (bayonet)
£23.99 (inc. UK Delivery) - In Stock
DC121 - Shipped on 28-Dec-2025 to Simon fully tracked and with a Lifetime Replacement Guarantee.
Dispatched: MERLO P26.6 SPT (1999 to 2006)
£19.99 (inc. UK Delivery) - In Stock
DC269 - Shipped on 01-Jan-2026 to Mauri fully tracked and with a Lifetime Replacement Guarantee.
Dispatched: MERLO DBM2500 EV (2002 to 2024)
£26.99 (inc. UK Delivery) - In Stock
DC099 - Shipped on 21-Dec-2025 to Bhawani fully tracked and with a Lifetime Replacement Guarantee.
Dispatched: MERLO P26.6 SPT (1999 to 2006)
£19.99 (inc. UK Delivery) - In Stock
DC269 - Shipped on 01-Jan-2026 to Mauri fully tracked and with a Lifetime Replacement Guarantee.
Dispatched: MASSEY FERGUSON 8737 AdBlue Tank (2018 to 2022)
£19.99 (inc. UK Delivery) - In Stock
DC125 - Shipped on 29-Dec-2025 to MALCOLM fully tracked and with a Lifetime Replacement Guarantee.
The Fuel Cap Company story
From One Small Problem to Thousands of Happy Customers
Our story began back in 2007, when a simple favour for a friend turned into something much bigger. We were trying to find a good quality replacement fuel cap — and soon discovered it wasn’t as easy as it should be. That small challenge sparked an idea, and The Fuel Cap Company was born.
Since then, we’ve been helping customers find reliable fuel caps they can trust. While the UK is still where most of our customers are, we’re proud to have sent fuel caps as far as France, Germany, India, Australia - and even all the way to New Zealand!
When you order from us, you’re not just buying a fuel cap. You’re choosing a product made in Europe to OEM standards, ISO 9001 certified, and backed by a family-run business that thousands of people around the world have relied on for years.
Mark Smart - Founder