Please use the push-pull controls pages the McFarlane Aviation catalog below to confirm the EC98 jam nut’s compatibility with your aircraft.
Replacement knurled friction adjust wheel for all McFarlane controls with a 9/16″ threaded adjustable friction lock mechanism.
- FAA-PMA Approved (Sub-Component of Approved Article)
- Manufactured by McFarlane Aviation, Inc.

AA4AD Specialty Tires of America Aero Classic Aircraft Tire | 7.00-7.5, 6 Ply
LP-019.080 SG Aircraft Rear door window - left, LP Aero Plastics FAA-PMA Replacement 019 SG
6277BP Park Brake Control Knob, Round, Black, McFarlane Replacement 