Reliable Aftermarket Parts Triple-Baffle Gas Cap for Farmall Tractors — Fits Cub, A, BN, C, H, M, Super H/M; Heavy‑Duty Leak-Resis

Heavy-duty triple-baffle gas cap designed to replace original Farmall caps and restore a secure, leak-resistant fuel fill for older tractors.

This aftermarket triple-baffle gas cap from Reliable Aftermarket Parts is built to fit a wide range of Farmall models, including Cub, A, BN, C, H, M, Super H and Super M. It reproduces key dimensions of the original cap to ensure proper seating and reliable operation, and it substitutes common part numbers such as 23995DA, 30-3049558, 7A824, B824, 161945A and 206622. Whether you’re refurbishing a restoration project or replacing a worn cap in the field, this unit restores correct fit and helps reduce fuel spillage and contamination.

Will this cap fit my tractor model?

The cap is machined to match original Farmall sizing so it fits many classic International Harvester models. Compare your tank opening measurements to the listed dimensions to confirm fit before purchase.

• Inside diameter: 2.725" — key for inner seat compatibility
• Outside diameter (OD): 2.886" — ensures proper external clearance
• Height: 5/8" — matches original cap profile
• Inside center diameter: 1.825" — aligns with filler neck center

How does the triple-baffle design help in everyday use?

Triple baffles provide staggered sealing surfaces that trap vapors and reduce splash-back when driving over rough ground. The layered barriers also slow fuel evaporation and limit the entry of dirt and moisture into the tank.

• Multiple seals reduce vapor loss and splashing
• Layered barriers help keep contaminants out
• Durable fit minimizes loosening from vibration

What original parts does this cap replace?

This aftermarket cap is intended as a direct substitute for several common Farmall and IH part numbers used across decades of production. Use it to replace lost or damaged caps without modifying the filler neck.

• Replaces part numbers: 23995DA, 30-3049558
• Also replaces: 7A824, B824, 161945A, 206622
• Fits multiple models including Cub, A, BN, C, H, M, Super H, Super M

Is installation straightforward for restorations and repairs?

Yes — installation is as simple as threading the cap onto the tank filler neck until seated. No special tools are required; check the fit by matching the cap dimensions to your filler neck and rotating until snug.

• No tools needed — screw on by hand
• Verify seating by matching listed dimensions to your neck
• Ideal for shop restoration or field replacement

Who this cap is for: Tractor owners, hobbyist restorers, and farm maintenance crews who need a reliable, dimensionally accurate replacement for worn or missing Farmall gas caps. If you maintain classic International Harvester machines and require a drop-in aftermarket cap that mirrors original measurements and common part numbers, this product offers a cost-effective, durable solution to keep fuel systems sealed and clean.