SNV431089 Fuel Cap for Kenworth for Peterbilt for Freightliner for Western Star

This 2x Locking Fuel Cap Set is a locking fuel cap system compatible with Kenworth, Peterbilt, Freightliner, and Western Star heavy-duty trucks and matches OEM part# SNV431089.

Product Overview

The 2x Locking Fuel Cap Set delivers a direct-fit, locking solution for heavy-duty truck fuel tanks. Built to replace standard caps, this locking fuel cap deters fuel theft and unauthorized access while maintaining an airtight seal against moisture and debris. These locking fuel caps are essential for fleet operators and owner-operators who need dependable diesel security.

Key Features & Performance

• Set includes two locking fuel caps and two keys for complete saddle-tank security.
• Heavy-duty metal body resists prying, impact, and extreme temperature swings.
• Direct OEM-style fit eliminates modifications; threads onto factory fuel filler necks.
• Multi-point locking mechanism ensures a reliable seal against fuel loss and contaminants.
• Corrosion-resistant chrome plating protects against road salt, diesel, and moisture.

Fitment & Compatibility

• Kenworth T680, T880, W900, and other heavy-duty models with standard large-diameter fuel fill necks.
• Peterbilt 389, 579, 567, and other Peterbilt trucks utilizing the same factory cap design.
• Freightliner Cascadia, Century Class, Coronado, and M2 106/112 models.
• Western Star 4900, 5700, 4700, and other Western Star heavy-duty trucks.

Common Uses

• Securing saddle tanks on long-haul semi-trucks against fuel theft at overnight stops.
• Replacing damaged or missing OEM fuel caps on commercial diesel vehicles.
• Preventing unauthorized fuel siphoning in fleet lots and terminal yards.
• Adding an extra security layer for trucks operating in high-theft urban or remote areas.
• Shielding fuel from dirt, water, and debris during off-highway and job site operation.

Technical Specifications

• Part Number(s): SNV431089
• Quantity: 2 Locking Caps, 2 Keys
• Material: Zinc alloy body with steel internal locking components
• Cap Type: Locking, vented
• Finish: Corrosion-resistant chrome plating

Frequently Asked Questions

Q: Will these locking caps fit my specific truck model? A: These caps are engineered for most Kenworth, Peterbilt, Freightliner, and Western Star trucks with the standard large-diameter fuel filler neck. Measure your existing cap thread diameter and compare to a 3.5-inch opening to confirm compatibility.

Q: How many keys come with the set, and can I get extra keys? A: Each package includes two caps and two identical keys. Spare keys can often be cut from the key code stamped on the lock face, though availability may vary—contact a local locksmith or the cap supplier.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.