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Lycoming/Aircraft Fuel Pump Tee Fitting With 1/8" Thread

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Part# 07-00783
MFR Model# KB-090-T


These fittings are designed to fit mechanical fuel pumps used on Lycoming engines. These fittings feature 3/8" AN flare outlets for connection to aircraft hoses, and are available in straight, 45 and 90 angle versions.

Note: These fittings are not FAA approved.

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  • Tee fitting with 1/8" pipe thread tapping for fuel pressure.
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Mark H Verified Purchase


April 12, 2022

Addressing the previous reviewer: This is not common but can happen. The parts involved are pipe thread so each have a taper to them. This could possibly fix itself with a different AN822 but most likely it has to do with the KB 90 T being tapped a little deeper than normal. Easy way to fix this would be to simply sand down the length of the AN822.

Vans A
September 17, 2015

Use extreme caution with this part. Threading an AN822 fitting into the 1/8 NPT hole will result in the fitting partially blocking the fuel flow through the part.

September 16, 2015


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 is the o-ring part number for the o-ring on the fitting 07-00783? Lycoming fuel pump fitting. I want to put a note in my builders book just in case I ever need to replace the fitting.

P/N# for the O-Ring on the fitting is MS29513-111.

Q: Is this fitting steel (part # 07-00783)?

Yes, this part is steel.

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