The retaining nut threads onto the threaded section of the control on the back side of the instrument panel to secure the control. Replacement retaining lock washer p/n EC111 for all McFarlane controls that attach to the instrument panel with a 1/2-20 thread.
- FAA-PMA (Sub-Component of Approved Article) Approved
- Manufactured by McFarlane Aviation, Inc.

MC0434135-10 Cessna 120, 140 Aircraft Elevator Tab Skin (Upper) | McFarlane Aviation MC043413510
3/16 7X19B 100 Aircraft Cable (Certified Stainless Steel 100 FT.)
BM2487-5 Ball | BM24875 