Article C6.2.1
Fuel Bladder Aperture Specifications
Technical Regulations
Article C6.2.1
Fuel Bladder Aperture Specifications
Chapter: C6
In Simple Terms
F1 fuel tanks have holes (apertures) for various purposes, but the total area of these holes can't exceed 35,000mm². For small circular holes under 35mm diameter, teams can install a plug secured with a single threaded fastener, as long as it has a secondary safety lock to prevent accidental loosening.
- Maximum total aperture area in fuel bladder is 35,000mm²
- Small circular holes (under 35mm diameter) can be plugged with a threaded fastener
- Threaded fasteners must have mechanical secondary locking for safety
- These specifications ensure fuel tank integrity and safety during racing
Official FIA Text
The total area of apertures in the fuel bladder must not exceed 35 000mm². Circular apertures smaller than 35mm diameter may be closed with a fitting, secured with a single threaded fastener on the full diameter of the opening, provided that this threaded fastener is provided with mechanical secondary locking.
fuel bladderaperturefuel tankthreaded fastenersecondary locking
2026 Season Regulations