The requirement is for 35 units of NSN 7R-4320-014552564-QE, reference 3920031-113, delivered FOB origin. The part requires engineering source approval by the design control activity and is flight critical, with technical data insufficient to support full and open competition. Only sources previously approved by the Government have been solicited, and new sources must qualify under the design control activity’s approved procedures. Non-approved sources must submit the source approval information required by the applicable NAVSUP WSS brochure with their proposal; incomplete submissions will not be considered for award. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, though responsible sources may identify their interest and capability, and FAR Part 12 commercial-item policies are not being used.