The Government is seeking 28 units of a flight-critical NSN 7R-5836-017308912-QF item, delivered FOB origin. Government source approval is required prior to contract award, and only previously approved sources have been solicited; unapproved bidders must submit the NAVSUP WSS Source Approval Information Brochure data along with their offer. The requirement is intended to be sole-sourced under FAR 6.302-1, though responsible sources may express interest/capability or submit proposals, and this notice is not a request for competitive proposals. FAR Part 12 commercial-item procedures are not being used, but interested parties may identify commercial-item interest/capability to the contracting officer. Standardized documents are available through DODSSP/ASSIST-Online, with DODSSP located in Philadelphia, PA; patterns, drawings, deviation lists, and purchase descriptions are not stocked there.