Misakomo Locking Fuel Cap Kit for Freightliner & Class 8 Trucks — 2-Pack Zinc-Alloy Side-Mount, 4 Keys

Misakomo locking fuel cap kit secures diesel tanks on Freightliner, Sterling and Western Star Class 8 trucks, providing theft and contamination protection with two zinc-alloy caps and four keys.

Whether you operate a Cascadia, Columbia, Coronado or several other Freightliner models, this two-piece locking tank cap set is engineered to replace standard non-locking caps and give drivers extra peace of mind. Made from heavy-duty Zamack 5 zinc alloy and featuring a side-mounted lock design, the kit aims to resist corrosion and stay tightly sealed in demanding road conditions. The package includes two caps and four keys for fleet convenience.

Which truck models and years are compatible with this Misakomo fuel cap?

This cap is designed for a broad range of Class 8 trucks from Freightliner, Sterling and Western Star. Check your vehicle model and build year against the compatibility list before ordering to ensure correct fitment.

• Freightliner: Argosy (1999–2015), Cascadia series (2008–current), Century, Classic, Columbia, Coronado and FL series (1994–current where specified).
• Sterling: Acterra, AT9500, LT7500–LT8500 (2003–2009).
• Western Star: 4700SF, 4964EX/Fx Constellation and 5700XE (specified years included).
• Refer to the product fit list in the description for exact model-year matches before purchase.

How does the side-mounted lock design improve security and usability?

Instead of a central lock mechanism, Misakomo places the key cylinder to one side, which simplifies turning and creates a tighter seal when locked. The repositioned lock reduces wobble and helps ensure the cap stays engaged even on rough roads.

• Side-mounted cylinder for easier key access and turning.
• Tighter closing action compared with middle-lock designs.
• Lower chance of accidental disengagement or cap loss during operation.

What materials and durability features should I expect?

The caps are cast from Zamack 5 zinc alloy, chosen for corrosion resistance and mechanical strength. That material and the cap’s construction are intended to withstand exposure to weather, road salts and typical fuel-related environments encountered by long-haul trucks.

• Zamack 5 zinc alloy body resists rust and corrosion.
• Robust construction designed for long service life in harsh conditions.
• Includes four keys so multiple drivers or vehicles can use the set without rekeying.

What’s included, and is there warranty support?

The kit ships with two locking fuel caps and four keys—enough for a truck and spare or for paired vehicles. Misakomo offers a 12-month warranty and customer support to address fitment issues or manufacturing defects.

• Two locking fuel caps plus four matching keys included.
• 12-month warranty with seller support via message/contact.
• Instructions for installation and fit verification typically provided with the product.

Who is this for: Fleet managers, owner-operators and maintenance technicians who run Freightliner, Sterling or Western Star Class 8 trucks and want a durable, keyed fuel cap to reduce fuel theft and contamination risk. If you need a long-lasting replacement cap that matches common Freightliner Cascadia and related models, this Misakomo kit is built to be a direct, secure upgrade.