The MCM83248 series o-rings are fuel proof FAA-PMA replacement o-rings. Only McFarlane has FAA approval to replace the old, less fuel resistant nitrile (MS series) and synthetic rubber (NAS series) o-rings with the latest fuel proof fluorocarbon o-rings! Flurocarbon rubber is commonly known as Viton. It is an advanced rubber that has extremely good fuel and heat resistance and is ideally suited for aircraft fuel system applications.
- 10 o-rings per package
- Viton (Flurocarbon Rubber)
- Replaces: NAS1593-024
- FAA-PMA Approved
- Manufactured by McFarlane Aviation, Inc.

MC0523098-1K Cessna Aircraft Improved Fuel Vent Line Kit, LH-Std/Integral Cell | McFarlane Aviation MC05230981K
553-256 Piper Bolt, FAA-TC Approved | 553256 