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.
- Dimensions: L: 4.25 x W: 2 x H: 0.25 in
- Weight: 0.0062 lbs

ACA-401B Aileron Ag-Cat Aircraft Cable, Grumman G-164A | McFarlane Aviation ACA401B
MS20664C4 Single Shank Ball, McFarlane Aviation 