EI A-102 ADAPTER PLATE 3-1/8" to 2-1/4" HOLE

Part# 10-01051
MFR Model# A-102


Makes a 2-1/4" EI instrument look excellent in a 3-1/8" mount. Black anodized, brushed alumnimum matches the instruments. Use the A-103 to mount the UGB-16 in a 3-1/8" hole.

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I received my order on time and it was packed great.

Oran W Verified Purchase

EI A-102 ADAPTER PLATE 3-1/8" to 2-1/4" HOLE

November 22, 2023

A quality product, not flimsy. The predrilled holes are perfectly spaced.

George H Verified Purchase

EI A-102 ADAPTER PLATE 3-1/8" to 2-1/4" HOLE

July 30, 2022

Well made, not flimsy.

98x L Verified Purchase

EI A-102 ADAPTER PLATE 3-1/8" to 2-1/4" HOLE

August 5, 2021

Its the correct part for future glider project. Thanks.

Brent G Verified Purchase

EI A-102 ADAPTER PLATE 3-1/8" to 2-1/4" HOLE

June 22, 2021

received exactly as described, would buy again if needed

Bryan S
June 16, 2020

as advertised, worked great, heavy duty

David L
May 24, 2020

Does what it’s suppose to. The outer holes are threaded, and comes with 4 screws. It’s pretty thick, and would support any instrument. I used it to mount a EI usb charger in a larger hole.

February 6, 2020

Fits the bill. Clean cuts, good quality anodized finish.

Cj N
June 1, 2017

Good way to put in newer lighter 2-1/4 instruments such as the Belite Turn Coordinator into a 3 1/8 mount. Good quality machined part.

Daniel F
June 9, 2017


Please note,'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. 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 are the dimensions for item 10-01051?

3-3/8" x 3-3/8"...square.

Q: Will the EI adapater plates work with JPI instruments, mainly the FS-450?

The FS-450 is a 2-1/4" instrument so the 3-1/8" TO 2-1/4" Adapter plate, part# 10-01051 will work.

Q: Does the A-102 come with matching color hardware (instrument screws) for at least the 3.125 inch outer ring mounting holes?

No, the A-102 does not come with the mounting hardware.

Q: What is the difference between the A-102 and the A-103?

The A-103 adapter is specific to the UGB-16 unit.

Q: I want to put a falcon vertical card compass inside a 3-1/8 existing hole, which adapter will work best?

We would recommend looking at part # 10-00010.

Q: 4 screws are included to mount A-103 plate to the UGB itself, but what screws do i need to mount A-103 to the instrument panel?

You would typically use brass 6-32 screws, but all panels are different so we could not give you an exact length.