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.

PSS-KT-34B SEAL KIT, Piper Strut | McFarlane Aviation, Inc.
MC345-085-4 Propeller Control for Cessna 177B, 177RG, F177RG Aircraft | McFarlane Aviation MC3450854 