The requirement is for 7 units of NSN 7R-9540-015099974-EY, with delivery FOB origin. The part is flight critical and/or lacks adequate technical data for full and open competition, so Government source approval by the design control activity is required before award. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, and only previously approved sources have been solicited. Non-approved sources must submit the NAVSUP WSS Source Approval Brochure data with their offer and meet the cognizant Government engineering activity’s qualification procedures; offers missing required data will not be considered. Drawings are not available, and FAR Part 12 commercial-item policies will not be used.