This requirement is for 40 units of NSN 7R-1680-016715197-YR, with delivery FOB origin. The item is flight critical and requires Government source approval; only previously approved sources have been solicited, and new source approval cannot delay award. Alternate sources must qualify in accordance with design control activity procedures approved by the cognizant Government engineering activity. If you are not an approved source, your proposal must include all data required by the NAVSUP WSS Source Approval Brochure or evidence of prior submission of that data. The Government is not using FAR Part 12 commercial item acquisition procedures for this requirement.