snobli Fuel Tank Cap for Freightliner M2 2 3/8" – Die-Cast Aluminum, Rubber Seal, Safety Chain

snobli Fuel Tank cap is a non-locking, non-vented replacement gas cap engineered to fit Freightliner M2 trucks with a 2 3/8" fuel filler neck.

If your Freightliner M2 or similar small box/semi truck needs a durable replacement fuel cap, this snobli cap is sized for filler necks with an inside diameter of 2 3/8". It’s built from die-cast aluminum alloy for corrosion resistance and heat dissipation up to 220°F, and it includes the practical hardware drivers expect: a rubber sealing ring, safety chain, and lifting ring. Note that this cap is not compatible with Freightliners that use rectangular steel fuel tanks and original brass caps.

Will this cap fit my Freightliner M2 truck?

This snobli cap was designed specifically for filler necks with an inside diameter of 2 3/8", a common size on many Freightliner M2 models and similar small box trucks. Before ordering, measure your tank filler neck or compare to your existing cap’s inner diameter.

• Fits filler neck inside diameter: 2 3/8" (measure to confirm)
• Intended for Freightliner M2 and compatible semi/small box trucks
• Not compatible with rectangular steel tanks that use original brass cap designs

What materials and hardware come with the snobli gas cap?

The cap body is die-cast aluminum alloy, chosen for strength, low corrosion and ability to shed heat at temperatures up to 220°F. The cap is supplied with a rubber sealing ring to help prevent leaks, a safety chain to keep the cap attached, and a lifting ring for easier removal.

• Die-cast aluminum alloy body — corrosion resistant
• Rubber sealing ring for improved sealing
• Safety chain and lifting ring included for convenience

Is this a locking or vented cap?

This snobli unit is non-locking and non-vented. It’s a straightforward replacement cap for applications that do not require keyed security or a venting mechanism. If your truck requires a locking cap or a vented design for fuel system pressure management, choose a model specifically built for those features.

• Non-locking — no key included
• Non-vented — suitable for systems that don’t need venting
• Simple swap-in replacement where compatible

How durable is the snobli fuel tank cap?

Constructed from die-cast aluminum alloy, the cap resists rust and stands up to typical roadside conditions. The material’s heat tolerance and the included rubber seal extend useful life compared with cheaper plastics, while the safety chain reduces risk of loss during refueling.

• Aluminum alloy resists corrosion and physical wear
• Heat-tolerant up to about 220°F for stable performance
• Rubber seal helps prevent dripping and vapor escape

Who is this for: The snobli Fuel Tank cap is aimed at truck owners, fleet managers, and maintenance technicians who need a dependable, non-locking replacement for Freightliner M2 and other trucks with a 2 3/8" filler neck. It’s appropriate when you want a corrosion-resistant metal cap with basic safety features—rubber sealing ring, safety chain, and lifting ring—and do not require a locking or vented design. Always verify your filler neck diameter and tank construction before purchasing to ensure compatibility.