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Steinair Eyeball Vent AV125B - 1.25 Inch - Black

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Part# 05-04061
MFR Model# AV1.25B


Anodized BLACK. OD is 2" and allows for direct connection of a 2" scat tube.

These eyeball vents are FAR SUPERIOR in their construction to those seen elsewhere and are of much higher quality. These are the highest quality vents that money can buy. For example, the Black Vents are 100% anodized aluminum....and unlike the overpriced and low quality vents produced elsewhere, these black vents don't require a "Plastic Flange" because of metal to metal contact . That's a sign of poor quality construction with metal on metal contact. These high quality vents have a nylon/delrin bushing encapsulated between the eyeball and the flange to protect the aluminum! On top of that, the larger vents sold elsewhere require a THREE INCH mounting pattern....4 Bolts which is much larger than need be. With these vents you simply cut a hole, install the vent and tighten the plenum or retaining nut behind it and hook up the tubing!

The vents include everything needed for need to try and cobble together your own plenum or flange for scat tubing. On the small vents you can just directly attach a 2" scat tube to the vent - and on the large vents they have 2" plenums. These will come with a "BAC" part number on them, but that's because they are normally for the cockpits of can figure out what the initials are for!
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -

Model Differences

  • For AV125 1-1/4" Eyeball Vent, OD is 2" and allows for direct connection of a 2" scat tube.
  • For AV1625 1-3/4" Eyeball Vent, OD is 2 3/4" and includes 2" Plenum Cup.
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Pricey, but they work great.

September 29, 2020

With the exception of price, these seem to be very well made. I did have to return the first ones I received because the plastic plenum wouldn’t unscrew from one and wouldn’t screw on on the other one. Aircraft Spruce promptly sent out replacements. Will give me a very clean looking install on my panel. I would buy again hopefully when they go on sale.

Mark S
May 21, 2018

Nice vent, but does not include screw-on flange for back which connects venting flex hose to eyeball vent and rear cylinder is too large for flex venting to fit over. You need a screw-on flange with threads on end closest to flex hose end.

Haley J
June 5, 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 diameter is the air flow through area of the AV125?

The vent has a 2" inlet and a 1-1/4" outlet.

Q: What is the size of hole needed to mount the vent in the panel?

These require a 2" hole.

Q: Is there any chance that these Steinair vents are PMA or TSO Approved?

No, these do not have PMA or TSO approval.

Q: What is the outside diameter of the retaining nut?


Q: What is the outside diameter of the face flange collar?

This measures to 2-1/4".

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