M642 4-3, Aircraft Headset Jack, Connector Plug
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Aircraft Headset Jack / Connector Plug. P/N M642/4-3. Alternate P/Ns 361-0020-00, 361-0020-000, JANP642, M642-4-3, MIL-P-642, PJ055M, PL125, SCD339L. NSN: 5935-00-194-7816. It was removed from a salvage aircraft.