This requirement is for 19 each of NSN 7R-2840-014304032-TN under TDP version 001, delivered FOB origin. The item is flight critical and/or lacks adequate technical data for full and open competition, so it requires Government engineering source approval by the design control activity and only previously approved sources have been solicited. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, though responsible sources may identify interest and capability or submit proposals, quotations, or capability statements; this notice is not a request for competitive proposals. Non-approved sources must submit the source approval information required by the applicable NAVSUP WSS Source Approval Brochure with their offer, and offers lacking all required data or documentation of prior submission will not be considered for award. If a submitted source approval request cannot be processed in time or approval requirements preclude timely delivery, award may continue based on Fleet support needs.