bansdans 4" Lever-Style Locking Diesel Fuel Caps 2-Pack — Aluminium, Pressure-Relief, Keys

These bansdans replacement fuel caps provide a direct-fit, non-threaded option for select Peterbilt models, giving a secure closure with a built-in pressure relief. Sold as a two-piece set, each cap includes its own key and hardware so you can replace both tank caps without sourcing additional parts. The caps are made from aluminum with a lever-style locking mechanism for tool-free operation and include rubber gaskets and 13-inch safety chains for proper installation and retention.

Which Peterbilt models and years will these caps fit?

These locking caps are built to match OE-style non-vented fuel openings used on many Peterbilt trucks. They are compatible with a broad list of models, especially across the 1995–2016 production span, and also work with some earlier and later model years where the same 4" non-threaded cap interface is used.

• Common compatible models include 330, 335, 337, 340, 348, 352, 357, 359, 362, 365, 367.
• Also fits models 375, 377, 378, 379, 384–389 and larger trucks like 567, 579, 587.
• Replaces factory numbers such as 11-04859-100, 11-04859-200, 572.1015 and 600212 for matching applications.

How does the lever-style locking mechanism work and what safety features are included?

The lever lock engages quickly without tools, making everyday access faster while keeping the cap secured against unauthorized opening. The cap incorporates a pressure relief feature that helps equalize internal tank pressure when refueling, and the non-threaded design fits into the OE recess for a proper seal.

• Lever-style lock for tool-free locking and unlocking.
• Integrated pressure release to ease opening during refuel operations.
• Non-vented, non-threaded body compatible with original tank openings.

What comes in the package and are the keys interchangeable?

Each order contains two complete locking caps plus installation accessories so you can replace both tank caps at once. Note that each cap has its own independent lock cylinder; keys are paired to their caps and are intentionally not interchangeable to improve security.

• Two 4" aluminum locking fuel caps with lever locks.
• Four matching keys, two rubber sealing rings, and two 13-inch safety chains.
• Each cap ships keyed separately—keys do not operate the opposite cap.

How do I install and maintain these fuel caps for best performance?

Installation is straightforward: seat the non-threaded cap in the OE opening, secure the lever, attach the safety chain, and confirm the gasket compresses evenly. Regularly inspect the rubber gasket for wear and the lock for debris; lubricate the keyway annually to ensure smooth operation and long service life.

• Seat cap in tank recess, engage lever until secure.
• Attach safety chain to tank bracket to prevent loss during fueling.
• Replace gasket if cracked or flattened; lubricate lock cylinder periodically.

Who is this for: owners and technicians of Peterbilt trucks who need a reliable, OEM-style replacement for 4" non-threaded diesel fuel openings. This set suits fleet managers replacing both tank caps at once, owner-operators restoring older models, and shops stocking dependable replacement parts for routine maintenance. For any fit questions, compare your vehicle's original part number with the listed replacements or contact the seller for application confirmation.