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Oil Door Hinge

$39.65/Each
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Part# 12-04708
MFR Model# 4640

Overview

The hidden hinge has a uniquely shaped arm that allows the hinge to be mounted completely out of view to the underside of the cowling. The center hinge eye is removed for the custom made spring that loads the hinge to be full open when unlatched. If your oil door unlatched it will be full open, eliminating accidentally taking off with the oil door unlatched. The hinge is aircraft quality extruded MS20001-4 hinge with a 3/32 steel hinge pin. One end of the hinge pin is flattened. When installed and closed the hinge pin is gripped tightly by the force of the spring.

Install the hinge so that the curved part of the hinge just misses the cowling when opening. We suggest you remove the spring to make it easier to see the range of motion during mounting. Mount the hinge to the cowling first; then mount the oil door to the hinge. Some builders may want to make an aluminum door instead of using a fiberglass door. Latching of the oil door can be accomplished with screws, camlock, dzus, hartwell latches, remote latches, etc. (available from aircraft hardware & aircraft supply houses).

Reviews

Works great an delivered fast. Thanks

Thomas H Verified Purchase

OIL DOOR HINGE 4640

January 5, 2022

Good hinge, good quality, perfect for a vans oil door.

Schudel M Verified Purchase

OIL DOOR HINGE 4640

September 5, 2021

Nice hinge for good price and comes with mounting instructions and spare spring.

Gary K Verified Purchase

OIL DOOR HINGE 4640

August 14, 2021

perfect what my cargo pods needed

Clifton B Verified Purchase

OIL DOOR HINGE 4640

June 4, 2021

Great little hinge for oil level stick inspection. It comes with a spare spring as well. I couldve made one. But, saved so much time just buying this one. Recommend.

Lewis M
September 22, 2020

Works well installed under a cowling door. Instructions are pretty clear.

Dennis S
March 15, 2020

works very good and I like that it pops open and stays that way until you close it.

Ken
December 23, 2019

Easy to install, looks and works great!

Don G
September 15, 2017

Q&A

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.

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