Friction Throttle Knob

Add to Wishlist
Part# 05-29100
MFR Model# A-2663-A


Large (2-Inch diameter) black solid plastic knob for the ACS A-800 friction throttle.

Made in USA
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


Perfect replacement for a stock throttle knob on a 1957 C-172. Very happy.

Trevor M
July 13, 2020

OK, I have a confession to make, and it is something you should pay attention to when you order this part. I ordered this for my Cessna 170 throttle cable. My old cable had the 1/4 x 28 threads. For some reason the new cable had 1/4 x 20 threads and I did not know this. Pay attention to the published thread size on this knob and the threads on whatever cable you are ordering for your aircraft. I was able to re-tap this with the courser 1/4 x 20 threads and it worked just fine! The knob is a perfect replication of the old original Throttle door knobs of the Cessna 170 series of airplanes. Love it.

June 21, 2019


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What is the thread size on this knob for part # 05-29100?

The thread size of this knob is 1/4-28.

View in Catalog

View Image View in Catalog