TINWID1919 2 1/4” Die-Cast Aluminum Fuel Cap for International Ford GMC Trucks — Non-Vented, Corrosion-Resistant

TINWID1919 2 1/4” die-cast aluminum fuel cap: a direct-fit, non-vented diesel fuel cap engineered for select International, Ford and GMC truck filler necks.

Designed to replace worn or missing diesel caps on medium- and heavy-duty trucks, this TINWID1919 fuel cap offers a robust die-cast aluminum body, specific thread profile, and size matched to common commercial fuel tanks. Before ordering, confirm the original cap diameter and thread type on your vehicle to ensure compatibility. The cap is intended for diesel use only and provides a durable, corrosion-resistant seal on compatible filler necks.

Will this cap fit my truck model and tank size?

Fitment covers many International, Ford and GMC medium-duty trucks produced across several model years. It works with specific D-style tanks and a range of commercial chassis. Always measure the original cap and check your truck model and year against the compatibility list before purchase.

• Compatible with International DuraStar (2002–current) and multiple International models including 4100/4200/4300/4400/4700/4800/4900 across listed years.
• Fits GMC C6500 (2003–2009), GMC TopKick (1990–2008).
• Fits Ford F600/F700 (1984–1998) and Ford F650/F750 (1984–2006).
• Works on 53- and 63-gallon D-style tanks where specified.

What are the exact dimensions and thread specifications?

This is a non-vented fuel cap sized to match common commercial filler necks. The listed measurements refer to the cap body and the across-thread diameter on the filler neck to guide fit checks.

• Cap across-threads diameter: 2 1/4 inches (cap body).
• Filler neck across-threads measurement: approximately 2 5/16 inches.
• Thread pitch: 11.5 threads per inch NPSH (National Pipe Straight Hose).
• Intended for diesel fuel systems only (non-vented design).

How durable and weather-resistant is the cap?

The cap is die-cast aluminum for strength and corrosion resistance in commercial conditions. Its non-vented design reduces intrusion of moisture and debris when properly sealed, and the metal construction withstands repeated use and road exposure.

• Die-cast aluminum construction for long-term durability.
• Non-vented body minimizes internal contamination risk when sealed correctly.
• Simple threaded seal — replace worn gaskets on the filler neck if leaks occur.
• Recommended for diesel applications only; not intended for gasoline systems.

How do I verify fitment before buying?

Measure your current cap and inspect your filler neck thread type to confirm compatibility. If the current cap is missing, measure the thread diameter across the filler neck and compare to the cap dimensions and thread spec below.

• Measure across threads on the filler neck — expected ~2 5/16" for this cap.
• Confirm the cap body across-threads is 2 1/4" to match vehicle fittings.
• Verify 11.5 TPI NPSH thread pitch for a correct screw-in engagement.
• Check the vehicle make, model, and year against the compatibility list before ordering.

Who is this for: Fleet owners, truck operators and maintenance technicians who need a reliable, heavy-duty replacement diesel fuel cap for select International, Ford and GMC medium- and heavy-duty trucks. If you maintain D-style tanks or operate the listed chassis and require a rugged, non-vented aluminum cap with a specific 11.5 TPI NPSH thread, this TINWID1919 cap is sized and specified for those needs. If your vehicle’s measurements or thread type differ, choose a cap matched to your filler neck to ensure proper sealing and safe operation.