5960-00-092-1066 (5960006778217)
5960-00-092-1066 is equivalent to manufacture part number 257. It is a electron tube retainer and is classified under Federal Supply Class 5960 (5960 - Electron Tubes), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 5960 - Electron Tubes and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.