Unknown parts for identification

[Kurtl]

Gentlemen, these parts are from a B-24 crashsite in Austria. I'd like to learn more about the discovered parts. Who can help me with the identification?

Find #1: size: ~ 50 mm x 35 mm (wrench size) - two screw threads with different diameter
Material: probably brass
Stampings: "ASP" and North American Aircraft Manufacturer ID: "NAA 184 T"

Find #2: size: diameter exactly 110 mm
Material: aluminum
Stamping: "ETF"

Find #3: shows some debris of plexiglass - notably white markings on it. What was it?

Thanks a lot in advance. Cheers - K.

 

[MiTasol]

Number 1 is easy - a standard AC811 (AC as in Air Corps) hydraulic coupling with NTP thread one side and flared pipe fitting on the other side that has been modified in some way.

ASP was a major supplier of hydraulic fittings.

The NAA inspection stamp indicates it was modified in some way - unmodified parts did not get an inspection stamp by the aircraft manufacturer. The NAA stamp also indicates the major assembly the part came off was built by NAA. Because some parts were made in one factory and shipped to other factories it does not guarantee the whole aircraft was NAA built.

AC811 fittings were replaced by AN816 fittings on most, but not all, aircraft later in the war. As you can see the AC fitting has no parallel section next to the flare which is why it is easy to identify. Where it was used on the aircraft is unknown. The AC811 remained in use where there was insufficient room to use the longer AN816.

 

[Kurtl]

Thank you very much for that identification. Interesting that a standard hydraulic part gets modified by an aircraft manufacturer. In that case the whole B-24 was built by North American Dallas (NAA). @ MiTasol: is your document available on the net? I have not much about spare parts being used in US aircraft.