The requirement is for 24 EA of NSN 7R-6130-016951040-E7 (ref H350261-2), delivered FOB origin. The part requires engineering source approval by the design control activity, is flight critical, and only previously approved sources have been solicited because available technical data is not adequate for full and open competition. Unapproved sources must submit the information required by the applicable NAVSUP WSS Source Approval Information Brochure with their offers, and offers lacking required data will not be considered. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, although responsible sources may identify interest and capability; this notice is not a request for competitive proposals. Market research indicates FAR Part 12 commercial-item procedures are not being used, but interested parties may identify commercial-item capability to the contracting officer.