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Eyeball Swivel Vent

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Black Gray
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This high quality, economical swivel air vent is made from 2024T351 aluminum and is available anodized black or grey. Diameter of the flange is 2.75" and the vent is designed to attach with a standard 2" air duct flange. The vent hole of this eyeball swivel vent is 7/8". The knurled collar on the vent swivels 60 to adjust air volume anddirect air flow as desired.

The vent features 4 mounting holes (1/8" dia.) which are spaced 2-3/8" apart or a mounting plate with a thickness of .71".
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Nice replacement for Cessna ones manufactured during the Cretatious period.

Samuel P Verified Purchase


August 8, 2023

The part was purchased as a component of a compact cabin heater for an gyroplane, and it worked as anticipated for that application. Quality and price were good. Although I was concerned about reviews describing a troublesome interaction between swivel and closure functions, I saw no such problems in the design, manufacture, and operation of the parts received. The location of the intake openings, on the sides rather than the axis of the swivel was surprising, and it requires a panel cutout and supply duct considerably larger in cross sectional area than the open aperture of the vent.

John S
January 16, 2021

Very nice quality. There is a small air leak if extra lubricant is not applied. Read the included instructions, disassemble and add lubricant.

February 7, 2019

Poor substitute for the common production wemac brand

Gary M
December 21, 2020

The vent looks nice and well made. However, trying to open or close the vent turns the direction but does not close the vent. Tightening the ring around the swivel portion (needs two hands) enables the vent to open or close but the swivel is so tight the direction of flow cannot be changed. So, to change the direction or flow volume is a long winded and two handed exercise. I wish I had spent twice as much.

Duncan K
February 22, 2020

Poorly made. Does not work well in opening and closing

William H Verified Purchase


February 25, 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: Can this vent be turned completely off? How is it installed? Thanks

Yes, this vent can be rotated fully closed by turning it 90 degrees clockwise. Here are the installation details: "The body of the air vent requires a 1.850 diameter or larger clearance hole. The vent is secured using 4 #10 screws located on a 2.375 diameter bolt circle. The ball and nozzle subassembly can be removed for access to the back if machine screws and nuts are used rather than sheet metal screws."

Q: What is the weight of this ACS eyeball swivel vent?

0.13 lbs.

Q: What is the recommended flange size for this swivel vent? I would like to know the flange diameter and SCAT tube diameter that work best with this vent. How is the flange attached to the vent? I am guessing that a hole pattern that matches the pattern on the vent is drilled into the flange and then mounted on the back side using the 4 #10 crews.

The manufacturer offers a round flange, part number 10350-8, but it does not have the mounting holes drilled. The installer must drill the holes. 10-32 flush head screws can be used to mount the unit. The vent on the panel, and the flange mounted on the back side, as mentioned in the question.

Q: Does this swivel to direct air flow?

Yes, it does.

Q: Are these priced and sold as a pair of vents or individually?

These are priced and sold individually. 1 vent for an order of 1.

Q: What size supply hose?

This unit will accept a 1-7/8" ID ducting.

Q: Is the gray color the aluminum with a clear coat?

It is anodized gray.

Q: What size hole is required to mount this vent?

1.82" per the drawing.

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