This notice is for a specific NSN part requiring engineering source approval by the design control activity to maintain quality. The approved source retains essential technical data and manufacturing knowledge not economically available to the Government, so an alternate source must qualify through approved procedures. The Government intends to solicit and negotiate with only one source under FAR 6.302-1. All responsible sources may identify their interest and capability, though this is not a request for competitive proposals. Interested parties can access relevant military specifications and standards via DODSSP/ASSIST-Online.