What type of connector is this

[NASAKING1]

On an aircraft oxygen mask that we bought the main connector that connects the oxygen line to its delivery system is unknown (shown in the attached image).

Any idea what type of connector this is?

Any feedback would be appreciated, thanks.

Aerospace Engineer
Designer, CFD, FEA Analysis

 

[ione]

http://flighthelmet.com/mm5/merchan...FHL&Product_Code=OXYP-1016&Category_Code=OXYF

Regards