A-790 Vernier Control - Blue

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The A-790 vernier control has a .078" dia. stainless steel wire core. Both the wire and Teflon™ lined flexible casing may be shortened as required. The Teflon liner provides low friction with heat resistance in high temperature areas such as engine compartments. Furnished with FAA-style knobs (Black, Red & Blue). Max. travel: 3-3/8". Stocked in the following lengths (measurement taken from under the panel nut to end of wire with knob pushed in).

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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.

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May 10, 2022


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 OD of the casing for the A-790 Vernier Control so I know what size of cable safe to order?

The A-790 housing O.D. is 1/4".

Q: What size is the threaded end on the A790 control so I can order the right rod end for it?

Model A-790 has a solid wire end. If you need a control with a threaded end you may want to look at model A-750 for a 10-32 threaded end, or A-970 for a 1/4-28 threaded end.

Q: Regarding the A-790 vernier control: What sized hole should I drill into the panel where the panel nuts lock the housing into place?

The panel requires a 3/4" hole to secure the knob end to the panel.

Q: Are these A-790 vernier blue controls FAA approved for certified aircraft?

No, only the part # A-790-12 is approved for certified aircraft.

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