The Fusion Rubber O-Ring is a replacement O-ring used throughout the Threeworlds Fusion pressure-fit connection system. Each individual Fusion connector uses one O-ring to help provide the friction and tension needed for a secure pressure-fit connection.
These O-rings are made from D90 nitrile rubber and measure 9/16 inch (14mm) internal diameter with a 0.10 inch (2.5mm) thickness and approximately 5/8 inch (16mm) outside diameter.
Fusion Compatibility
This replacement O-ring is used in individual pressure-fit connectors found across several Fusion components, including:
- Fusion Handle
- Fusion Spin Handle
- Fusion Double Adapter
- Fusion Ultra Dragon Hub
Each individual connector uses one O-ring, so components with pressure-fit connectors on both ends require one for each connector.
Maintaining Your Fusion Connectors
If your Fusion connection is no longer tightening or releasing as smoothly as it used to, inspect the O-ring along with the rubber bushes, nylon washers, and cam bolt for wear or damage.
For installation, adjustment, and maintenance instructions, see our guide to using Fusion pressure-fit connectors.








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