This requirement is for NSN 7R-1680-014755808-KB, quantity 4, with delivery FOB origin. The part is flight critical and requires engineering source approval, so only sources previously approved by the Government have been solicited. New sources must submit the information detailed in the NAVSUP WSS Source Approval Information Brochure, or a cover letter if a source approval request is already being evaluated, to be considered. Offers that fail to provide all required source approval data will not be considered for award. The Government is not using commercial item acquisition policies for this procurement.