5820-00-053-4138 (W71483-1A)
5820-00-053-4138 is equivalent to manufacture part number 621-268. It is a cathode ray tube visor and is classified under Federal Supply Class 5820 (5820 - Radio and Television Communication Equipment), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 5820 - Radio and Television Communication Equipment and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.