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Freightliner M2 Truck Locking Fuel Cap

Made with Pride in the USA

Made in USA

Price from:
$ 66.75

Top Features:

  • Freightliner M2 2.5" - 8 Aluminum Cap Assembly
  • 8.00" Chain & 6.50" Bail
  • Stamped w/ "DIESEL FUEL ONLY"
  • UN (United National) Triple Lead
  • 220°F Thermal Relief

Note: When you Order a pair of Locking Fuel Caps, they will be Keyed Alike (use the same key).

Freightliner M2 Cap Assembly Aluminum M-2 2.5”- 8 / LOCKING (ID of Cap 2.38”)

$ 66.75 - Standard Fuel Cap For Freightliner M2 (FTA-C-13)
Fuel Tank Must be Vented

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Out of Stock - Expect end of this week

$ 75.75 - Chrome Fuel Cap For Freightliner M2 (FTA-C-13C)
Fuel Tank Must be Vented

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Fuel Tank Accessories - Freightliner M2 Locking Fuel Cap

Freightliner M2 Locking Fuel Cap

  •  Availability:
  •  In Stock
  •  Weight:
  •  Shipping:
  •  See Cart
  •  Tax:
  •  Paid
  •  Manufacturer:
  •  Fuel Tank
  •  Model No.:
  •  Several
  •  Dimension:
  •  2.5" 8 UN
  •  Height:
  •  Warranty:
  •  90 Days
  •  Returns:
  •  30 days w/ 15% Restocking Fee

  • Shipping GuideShipping Guide

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Freightliner M2 Truck Locking Fuel Cap

Fuel tank cap that fits your Freightliner M2 class 7 truck. It features an 8.00" Chain & 6.50" bail that keeps your cap from getting lost.

Note: Always measure the inside diameter (ID) of Fuel Cap for a more positive Identification if there is any question as to which Cap to use. Should the Cap not be available - measure the outside diameter (OD) of the Fill Tank Neck to determine inside Diameter (ID) of Cap.

Always make sure and if the Tank is either Vented or non-Vented in order to spec correct Vented or Non-Vented Cap. (note: a Vented Cap is made to work with a non-Vented Tank; it is also safe to use on a Diesel Fuel Tank that is already Vented) a non-Vented Tank Must have a Vented Cap to operate properly.

The inside diameter (ID) of Caps used with Low-Sulfur labeled Diesel Fuel Tanks are smaller and have different treads than Caps used with Diesel Fuel Tanks that have no Low Sulfur Label. (See the Volvo Description on the above PDF File as an example)

All Caps are Threaded Female style. (except the Peterbilt Lever Style and Freightliner Cam-Cap Style) Some Older Fuel Tank fill necks (pre 2000) may have a different size and thread than current Tanks.

Though Steel Tanks are not as common in the HD Truck Industry as Aluminum, it is recommended to clarify whether the tank is Aluminum or Steel.

NPSM (National Pipe Straight Medium) Threaded Caps will not fit NPSL (National Pipe Straight Loose) or NPT Fill Neck Threads. However, NPSL will fit NPSM threaded Fill Necks.

Other Features:

  • Locking for 2.5" Threaded Neck
  • 220°F Thermal Relief (Over Temperature) Locking
  • 8 UN (United National) Triple Lead
  • 8.00" Chain & 6.50" bail (End of chain connection) w/ "DIESEL FUEL ONLY"
  • Numbers on the underside of the cap: FTA-C-13
  • "Drop Tested" to meet DOT qualifications for HWY Transportation Fuel Tank safety. FMCSA-39367

Example Fuel Cap Measurement

Example Proper Fill Neck Measurement