Brass Fuel Tank Access Bulkhead

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Part# 15-06130
MFR Model# 392C-94


Tank Access Fitting. Eliminate push-in type grommets with this precision brass bulkhead fitting. 1/4"-npt threads accepts both threaded valves or barbed fittings. Requires 3/4" tank access hole.

Kit Includes:
    1 - 8561-1 Tank access Bulkhead
    2 MS29513-210 - Fuel compatible gaskets that double seal to any tank wall up to 0.35" thick.
Note: Must have access through cap to tighten inside nut. Measures: 0.95" long Weight: 2 oz
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -



Joe B
February 2, 2020

Easy to install - works like a charm.

Andrew N
December 28, 2017

o-rings bulged out past the fitting head and washer sides with only minimal torque. Used large diameter washers to ensure reasonable seal. Also, star washer would have cut into o-ring without flat washer. Seems to be holding ok.

Laurie M Verified Purchase


June 1, 2021

Dont think about trying to use these as a sump fitting on a cross-linked poly gas tank. The round o-rings will not seal. They just deform out from under the nut and head and the fitting leaks. Not flight worthy. Dont ruin a tank for this. The brass is good quality and the threads and other machining are first rate, but this wont seal.

Phill S
January 2, 2019

Mine didnt come with the rubber gasket, so it was unusable.

August 25, 2017


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: The internal diameter its 1/4 NPT?

External thread is 3/4-16 | Internal thread is 1/4 NPT

Q: Two questions. What is the diameter of the flange? Confirm that the 1/4NPT thread is bored from the flange end, not the tail end? Thanks.

The flange is a 1" hex , the attaching nut is a 1" hex as well.