bansdans 2-Pack 3-Inch Female 1/4-Turn Locking Fuel Tank Caps — Aluminum with FKM Gasket

This is a heavy-duty 3-inch female 1/4-turn locking aluminum fuel tank cap kit for Freightliner diesel trucks, sold as a 2-pack with dust covers, keys, safety chain and bail.

Designed as an OEM-style replacement for part numbers like 03-37017-000 and 03-37017-002, this bansdans kit fits a wide range of Freightliner models and provides a corrosion-resistant, non-vented seal for diesel fuel filler necks. The set ships with FKM gaskets, a 1/4-turn locking mechanism, matched keys and accessories to simplify installation and reduce fuel contamination and unauthorized access.

Which Freightliner models and part numbers does this cap replace?

This 3" female cap is engineered to match original equipment specifications for many Freightliner trucks. It is intended for diesel systems and replaces several OEM references to ensure fit and function.

• 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.
• Meets the 3-inch outer filler neck standard for diesel truck applications.

How does the cap keep fuel secure and clean?

The cap uses a quarter-turn locking mechanism and a premium FKM rubber gasket to form a tight, non-vented seal that reduces leakage and keeps out dirt and water. The aluminum body resists corrosion from road salt and weather, extending service life in heavy-duty use.

• FKM gasket for chemical and temperature resistance.
• Non-vented design minimizes evaporation and contamination risk.
• 1/4-turn locking action for a positive, audible lock.
• Aluminum construction for improved corrosion resistance.

What comes in the 2-pack and what tools are needed for installation?

The kit is ready to install right out of the box with no specialized tools required. Each package contains two complete caps plus installation accessories and spare keys to replace damaged or lost items.

• Includes: 2 x 3" female 1/4-turn locking caps, 2 dust covers, 4 matched keys.
• Also includes: 13" safety chain and 6.5" bail for secure tethering of the cap.
• Tool-free installation: insert and quarter-turn — no drilling or special tools.

Will this cap work for diesel only, and are there any installation tips?

This caps kit is specified for diesel fuel systems only and is non-vented, so it is not suitable for applications that require venting. For best results, clean the filler neck before installation and inspect the gasket periodically for wear.

• Intended for diesel fuel use; avoid gasoline or vented tank systems.
• Clean filler neck and check threads before seating the cap.
• Finger-tighten to the 1/4-turn stop; use keys only for locking/unlocking.
• Replace gasket if torn or hardened to maintain seal integrity.

Who is this for: This bansdans 2-pack is aimed at fleet managers, owner-operators, and maintenance technicians who need an OEM-compatible, durable replacement cap for Freightliner diesel trucks. It's also appropriate for anyone seeking a cost-effective spare set with theft-deterrent keys, protective dust covers and durable materials for frequent on-road use.