Thread size for air fitting

[RenegadeActual]

This is the bulkhead branch tee that goes in the middle upper part of the firewall on my M54A2 it also connects to the pressure regulator on the firewall and I cant for the life of me find the thread size on the line sides. I know the center is 1/4" mpt. I beleive the other sides are 3/8 but 3/8 compression doesnt fit.

Does anyone know where I can get this tee?

 

[Guyfang]

Tech data.

	THREAD CLASS	3A ALL ENDS
	CONNECTION STYLE	FLARELESS (TUBE) ALL ENDS
	LEG LENGTH	0 797/1000 INCHES MINIMUM ALL ENDS AND 803/1000 INCHES MAXIMUM ALL ENDS
	CONNECTION TYPE	THREADED EXTERNAL TUBE ALL ENDS
	THREAD QUANTITY PER INCH	24 ALL ENDS
	NOMINAL THREAD SIZE	0 531/1000 INCHES ALL ENDS
	SEAT ANGLE	20 DEGREES ALL ENDS
	NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED	0 3/8 INCHES ALL ENDS
	MATERIAL	COPPER ALLOY OVERALL
	THREAD SERIES DESIGNATOR	UNS ALL ENDS
	SPECIFICATION/STANDARD DATA	81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
	NONDEFINITIVE SPEC/STD DATA	3A FIGURE

There is a raft of NSN's and part numbers if you want them.