Part# AN3021-1
MFR Model# 8800K16
AN No.MS No.Mfgrs. PNContactToggle Circuit
AN3021-1MS35058-21JBT - MS No.SPDT1


Toggle switches are available with two or three operating positions, 1 hole mounting and a variety of circuitry & electrical ratings. Contacts are made of solid silver. Wide usage is found in aircraft, mobile, marine, electronic and industrial applications. Available in full "AN" standard size & Ultra Miniature 1/2" size. Leading manufacturers of toggle switches are Micro Switch, Alcoswitch, Cutler Hammer, & JBT, now Cutler Hammer. Orders will be filled with switches of the manufacturer whose product is available in local stock.

Note: * Momentary Contact
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -

Toggle Circuit Table

Circuitry with Toggle at

1 On Off On
2 On None Off
3 On None On
4 On Off On*
5 On* Off On*
6 Off None On*
7 On Off None
8 On Off None
9 None Off On*
10 On Off* None
11 On None On*
12 On* On None
13 On On None

* Momentary contact

Tech Data


Reference Chart

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Replaced the nav switch with this an3027-1 dpdt switch on a 1966 Piper cherokee that was blowing the fuse. Worked perfectly and resolved the problem.

Richard W
May 13, 2021

Excellent little switch

Germaine J
March 8, 2021

Excellent. I was amazed how quickly the order processed and arrived in these trying times. Keep up the good work & Happy New Year to all the fine folks at Aircraft Spruce

Jeffrey H
December 31, 2020

Good feel to the toggle and proper amp rating.

Jeffrey C
November 17, 2020

Good Product.

Kevin V
October 20, 2020

Good Product.

Kevin V
October 20, 2020

what part number for a double pull on-none-off Thanks

Mike M
October 2, 2020

Im very impressed by the quality of these toggle switches.

Stephen P
July 27, 2020

I used MS35058-22 as it is specd in the Aspen install manual. It is what it is and it works..

Ray A
June 25, 2020

We rely on Aircraft Spruce parts for their quality and prices.

May 11, 2020


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 Amp rating is the AN3027-2 switch?

This is a 20 amp switch.

Q: Does the AN3021-2 measure approximately 1-1/8" x 5/8"?

Yes, these are the approximate dimensions: 1-1/8" L x 5/8" W x 5/8" H.

Q: When the chart shows "None" in a given position (e.g. center position), does that mean that the switch does not have that position? In my example, with None in the center position, the switch just moves from On for Up to Off for Down?

Correct. With "None" in the center position, the switch will toggle only all the way up to all the way down.

Q: MS35059-27 is described as momentary on in both on positions, does that mean that the switch lever is spring loaded and stays on as long as it's held in one of the on positions?

Yes, push the lever to either position to activate, and the lever will spring back to center off, if not held in position.

Q: Are these Toggle Switches acceptable for 14V dc system?

Yes, these switched will work in 14v dc systems.

Q: What is the hole size of the SPST toggle switch?

The hole size for the toggle switches to fit through the panel is 1/2".

Q: What does the asterisk mean in ON* for these toggle switches?

The * represents momentary on. Essentially it's on at contact and then once released it is back off. It does not stay on.

Q: On which side of the switch does the mounting hole keyway slot reside? Is it on the up/on side or the down/off side? I am laser cutting mounting holes and want to be sure the panel tooth is aligned properly for the switch slot.

The keyway slot is on the down/off position.

Q: How do I order quantity 12 of MS35059-23 toggle switches?

Enter 12 in the input box in the "Buy" column in the ordering grid. Then, click the "Add to Cart" orange button below and the items will be instantly added to the shopping cart.

Q: Do the switches include hex nut, lock washer and key washer?

Yes, included are 2 hex nuts, 1 lock ring, and 1 lock washer.

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