The Government intends to procure two units of NSN 7R-1560-016992705-E7 (ref 123CS10004-301) on a sole-source basis under FAR 6.302-1, with delivery FOB origin. The part requires engineering source approval by the design control activity because the approved source(s) hold essential design capability, manufacturing/repair knowledge, or technical data not economically available to the Government. An alternate source must qualify under the design control activity’s procedures, as approved by the cognizant Government engineering activity. Responsible sources may identify their interest and capability or submit proposals/quotations, though this notice is not a request for competitive proposals. Drawings are not available, and FAR Part 12 commercial-item policies are not being used.