The Government intends a sole-source award under FAR 6.302-1 for 403 EA of NSN 1R-2840-016666863-B8, made IAW reference 5146T08P01, delivery FOB origin. The item is flight critical and requires Government engineering source approval prior to award because adequate technical data for full and open competition is not available, and only previously approved sources have been solicited. Non-approved sources must submit the source approval information required by the applicable NAVSUP WSS Source Approval Information Brochure with their offer; incomplete submissions will not be considered. Award may proceed based on Fleet support needs if a source approval request cannot be processed in time. All responsible sources may identify their interest and capability, and the Government will use that information to decide whether to conduct a competitive procurement.