LOBIUTIYA 3" 1/4-Turn Locking Fuel Tank Caps 2-Pack for Freightliner – Aluminium, FKM Seal, Includes Keys

LOBIUTIYA 2-pack 3" female 1/4-turn locking fuel tank caps are OEM-compatible aluminum replacements with FKM gaskets and keys, built to fit many Freightliner models and resist diesel, oil, and heat.

If you need a reliable replacement for worn or missing truck fuel caps, this two-pack from LOBIUTIYA matches several Freightliner part numbers and offers corrosion-resistant aluminum construction, a durable fluoroelastomer seal, two dust covers, safety chains, and four keys. The 3" dimension refers to the filler neck outer diameter and this kit is designed for diesel, non-vented applications where a secure 1/4-turn locking action is required.

Which Freightliner models and part numbers does this cap replace?

These caps are made to be compatible with many Freightliner trucks and to substitute common OEM part numbers. They fit 3" diesel filler necks on several model lines and align with replacement references used by fleets and owner-operators.

• Compatible models: Cascadia 113/125 (2008–2018), Columbia 112/120 (2001–2016), Century 112/120 (1996–2010), Coronado (2003–2022), M2-112 (2005–2022).
• OEM cross-references: 03-37017-000, 03-37017-002, 0334466002, 600149, 572.1018, 918010.
• Intended for diesel, non-vented tanks only; check filler neck outer diameter to confirm 3" fit.

How durable is the cap and what prevents leaks?

The cap body is machined from aluminum to resist corrosion from road salts and weather. Sealing is handled by an FKM fluoroelastomer gasket, chosen for its chemical and thermal resistance so it holds up against diesel and oils.

• Aluminum housing: long-term corrosion resistance on metal filler necks.
• FKM gasket: resists hydrocarbons and high temperatures for a tight seal.
• 1/4-turn locking mechanism: quick, secure engagement to reduce vapor loss and seepage.

What comes in the package and how easy is installation?

The LOBIUTIYA kit includes two caps and accessories so you can replace both primary and spare caps or outfit two trucks. Installation is tool-free: the 1/4-turn design clips into the filler neck in seconds, and the included chain and keys keep the caps secure and accessible.

• Includes: 2 locking caps, 2 dust covers, 13" safety chain with 6.5" bail, and 4 matching keys.
• Quick install: fits and locks with a simple 1/4-turn — no tools needed.
• Dust covers: reduce dirt and debris near the opening to extend service life.

What if my truck’s filler neck won’t lock perfectly?

Most installations lock securely, but variations in tank neck wear and manufacturing tolerances can sometimes cause a fit issue. LOBIUTIYA offers customer support and adjustment solutions if your cap doesn’t latch as expected.

• Common cause: worn or deformed filler neck mating surfaces.
• Support available: contact the seller for troubleshooting and adjustment guidance.
• Spare parts: two caps and extra keys included to facilitate quick replacement if needed.

Who this is for: This 2-pack is aimed at truck owners, fleet maintenance teams, and mechanics who run Freightliner models with a 3" diesel filler neck and need a durable, locking replacement that resists diesel and road conditions. It’s particularly useful for those who want corrosion-resistant aluminum construction, chemical-resistant FKM sealing, and a ready-to-install kit with dust covers, chain, and multiple keys — ideal for minimizing downtime during routine maintenance or cap replacement.