This requirement is for NSN 7R-1680-014839376-EL, TDP version 001, quantity 6 each, delivery FOB origin. The item is flight critical and requires Government source approval by the design control activity; only previously approved sources have been solicited because they retain essential data rights, manufacturing/repair knowledge, or technical data not economically available to the Government. An alternate source must qualify under the design control activity’s approved procedures, and approval time normally cannot delay award. Non-approved sources must submit the information required by the applicable NAVSUP WSS Source Approval Information Brochure with their offer, and offers missing required data will not be considered. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, but responsible sources may identify interest/capability or submit proposals, and commercial item interest may be identified to the contracting officer; FAR Part 12 is not being used, and certain trade agreements may apply.