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Usher Flush Fuel Caps

From $24.50 to $109.75
Prices below incude GST
Description Part Number Price Buy
UD-3-F Fuel Cap with Flat Adaptor
05-01061
$120.73
Quantity
UD-3-C Fuel Cap with Contoured Adaptor
05-01062
$120.73
Quantity
UD-3-C Fuel Cap Only
05-15373
$94.33
Quantity
UD-3 Latch & Post Assembly
05-27366
$26.95
Quantity
Subtotal $0.00
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Overview

The UD-3 flush fuel cap assembly is an unvented cap similar in design to the #5 style cap. The aluminum mounting ring has a 2" dia. opening and an overall dia. of 3-3/4 inch. It may be riveted, bolted or molded to the tank. It is currently used on many popular homebuilts such as the RV’s, Lancair, Velocity & White Lightning. Specify flat or contoured adapter.

Tech Sheet

Specifications

  • 2-5/16" OD on top of cap
  • Approx 1-1/2" total height

Reviews

Appears well made. Be aware it will need polishing up to go in your shmick new aircraft Very well packaged and prompt service.

Malcolm F Verified Purchase

UD-3-F Fuel Cap With Flat Adaptor

November 11, 2024

Works great. Fast service. Thanks for supporting EAA

Thomas Y Verified Purchase

Latch And Post For UD-3 Gas Cap

September 22, 2024

The original gas caps on my RV-6A woul not completely latch closed. The bottom of the latch had worn. I added the two new o-rings and ss washer to complete the rebuild. Works perfectly!

M.s. D Verified Purchase

Latch And Post For UD-3 Gas Cap

June 15, 2024

Worked perfectly for the fuel caps for an RV-10. Miine had worn and would no longer snap into place when closing. The latch would want to sit slightly proud above the cap. Thought I would have to replace the whole cap until finding this part. Worked PERFECT!

Randy V Verified Purchase

Latch And Post For UD-3 Gas Cap

December 3, 2023

welded this to a Midget Mustang header tank and it works great! I highly recommend this.

Stephen T Verified Purchase

UD-3-C Fuel Cap With Continental Adapt

November 6, 2023

Yep, it is the fuel cap for the RV. I didn’t need to adjust, just dropped in the tank and I was back in business

Brent L Verified Purchase

UD-3 Gas Cap

July 8, 2022

perfect replacement. You dont realize how worn out your current ones are until you get a new ones

Donaven C Verified Purchase

UD-3 Gas Cap

February 1, 2022

Keiji K Verified Purchase

UD-3-F Fuel Cap With Flat Adaptor

November 5, 2021

Exactly what I needed

Alejandro M Verified Purchase

UD-3 Gas Cap

October 20, 2021

Great part as per the catalogue.

Ray T
June 19, 2020

Q&A

Please note, Aircraft Spruce Australia'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 Australia 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: Which O-ring shall be used with 05-01061? Thanks

You can use either 05-02146 (USHER O-RING 2-325 LARGE) or 05-02147 (USHER O-RING 2-012 SMALL), which can be found in the "Accessories" tab.

Q: What is functional difference of large and small O-rings? Thanks

There is no functional difference. They are used in two different spots of the fuel cap. Both should be replaced annually or as needed. Please see the "Tech Sheet" tab for complete details of where each is used.

Q: What type of allow is the flange of these Usher fuel caps made of?

Per the supplier: It is 6061 alloy.

Q: What is the function of the Contoured Adapter? What shape does it fit?

The function of the contoured adapter is the shape of the ring that the cap will fit into. The contoured ring has a small flange to it compared to the flat adapter which has a flat ring.

Q: Are the Usher flush fuel caps and seals compatible with diesel or Jet fuel?

Yes, these are compatible with diesel and jet fuel.

Q: How much do the 05-01061 & 05-01062 Fuel Caps w/Adaptors weigh? I cannot find a weight on the spec sheet for each assembly.

Each weighs .375 lbs

Q: Can I purchase just the cap without the adapter?

Yes, but this is a special order. Please contact sales department for pricing and lead time details.

Q: What is the OD (outside diameter) of the Contoured Adapter?

P/N# 05-01062 will be 3.80".

Q: What are the outside dimensions of the flange?

3.80"

Q: What is flat vs countoured?

Contoured is curved to match the curve of a wing.

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