Keyhole Slot (Aircraft Design)

Keyhole Slot (Aircraft Design)

A keyhole slot in aircraft design is a type of structural or mechanical mounting feature resembling a keyhole — typically consisting of a round entry point that narrows into a straight slot. This configuration allows components to be secured quickly and reliably using fasteners that are inserted through the round section and slid into the slot to lock in place.

Applications

• Used for rapid installation and removal of non-structural parts, such as access panels, inspection doors, or interior fittings.
• Common in maintenance-heavy zones where fast access is necessary without the need for complete unfastening.
• Sometimes used in conjunction with quarter-turn fasteners or other quick-release mechanisms.

Advantages

• Allows simplified installation and removal procedures.
• Reduces the number of tools required.
• Minimizes time spent during maintenance operations.

Limitations

• Not suitable for primary structural load paths.
• Can be susceptible to wear if not properly reinforced.

Examples in Aviation

• Mounting points for removable avionics trays.
• Quick-detach fairings or aerodynamic panels.
• Cabin interior components like light fixtures or trim panels.

Design Considerations

• Material choice is critical to ensure long-term durability.
• Must be sized appropriately for the load and locking mechanism.
• Often reinforced with bushings or wear-resistant inserts.