2 3/8" Locking Diesel Fuel Cap for 02 & Up Freightliner M2 Small Semi Box Trucks

2 3/8" Locking Diesel Fuel Cap for Freightliner

This locking diesel fuel cap replaces the factory cap on 2002 and newer Freightliner M2 small semi box trucks, securing the fuel tank against theft and contamination.

Overview

The 2 3/8" locking diesel fuel cap is a direct-fit security upgrade for Freightliner M2 trucks built from 2002 forward. It seals the filler neck with a keyed lock to prevent fuel theft and keep debris out of the diesel. Fleet managers and owner-operators rely on this locking diesel fuel cap to protect valuable fuel in high-mileage operations.

Built For Performance

• Weather-resistant lock cylinder with dust cover
• Precision 2-3/8" thread pattern matches the tank neck
• Corrosion-resistant composite and metal body
• Tethered retaining strap keeps the cap attached during fueling
• Vented design prevents vacuum lock in the fuel system
• Includes two keys for easy driver sharing

Fits These Machines

• for Freightliner M2 106 (2002 & newer)
• for Freightliner M2 112 (2002 & newer)
• for Freightliner M2 small semi box trucks with 2-3/8" filler neck

On-The-Job Use

• Over-the-road diesel tank security
• Local delivery fleets making frequent stops
• Construction site trucks parked overnight
• Agriculture and ranch fleet fuel protection
• Refuse and utility truck fueling stations

Specs At A Glance

Good To Know

Q: Does this cap come with keys? A: Yes, it includes two keys, providing a spare for the shop or another driver.

Q: Will this cap fit a 2001 Freightliner M2? A: This cap is designed for 2002 and newer M2 trucks with a 2-3/8" filler neck; older models or different neck sizes may need a different cap.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.