Skip to product information
Semi Truck Locking Diesel Fuel Tank Cap Cover for Freightliner Western Star 2X
$194.39
Sale price
$194.39
Regular price
Quantity
Pickup currently not available
Secure Checkout • Encrypted Payments
Free Shipping
Contiguous U.S.
1-Year Warranty
Parts you can rely on
30-Day Returns
Hassle-free returns
Need help confirming fitment?
Talk with a parts expert today.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I needed a forklift part and wasn’t sure which one fit. They asked for the model and serial number, got back to me quickly, and made sure I ordered the right one. Really helpful.
Randy W. — Verified customer
Equipment Fitment
Review the equipment and model information below. Fitment can vary by serial number, production date, or machine configuration, so confirm your model and reference numbers before ordering.
Equipment / model
- Freightliner Cascadia, Columbia, and Century models
- Western Star 4900, 5700XE, and 4800 series
- Other Freightliner and Western Star trucks with standard threaded diesel fuel tank necks
- Fits most class 8 semi-truck fuel tanks configured for a screw-on cap
Product Overview
The 2X Semi Truck Locking Diesel Fuel Tank Cap Cover replaces standard fuel caps with two keyed-alike locking caps, keeping your diesel secure from theft and contamination. These heavy-duty locking diesel fuel tank caps thread directly onto the filler neck of most Freightliner and Western Star semi-trucks, providing a tight, tamper-resistant seal. Built for long-haul reliability, these semi-truck locking fuel caps give fleet managers and owner-operators peace of mind at every stop.
Key Features & Performance
- Two-piece set includes both a locking fuel cap and a spare, with matching keys
- Keyed alike design—one key operates both caps for quick, one-handed fueling
- Heavy-duty die-cast metal body resists impacts, vibration, and harsh weather
- Corrosion-resistant chrome finish keeps the cap looking new after years of road use
- Vented cap relieves internal tank pressure without leaking fuel or introducing moisture
- Easy hand-tighten installation—no special tools or modifications required
Common Uses
- Securing diesel fuel tanks on long-haul semi-trucks
- Preventing fuel theft at overnight parking areas, rest stops, and depots
- Fleet-wide fuel security for logistics and transportation companies
- Replacing worn, missing, or non-locking fuel caps on heavy-duty trucks
Frequently Asked Questions
Q: Do these caps come with keys? A: Yes, the 2-pack includes two locking fuel caps and two matching keys. Both caps are keyed alike, so a single key operates both.
Q: Will these fit my specific Freightliner or Western Star model? A: These caps are designed to fit standard diesel filler necks found on most Freightliner and Western Star semi-trucks. Always verify your tank’s thread size—commonly 3-1/2" NPT—before ordering.
Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.