6730-01-020-2826 (SM-C-603035)
6730-01-020-2826 is equivalent to manufacture part number D-50. It is a door viewer and is classified under Federal Supply Class 6730 (6730 - Projection Equipment), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 6730 - Projection Equipment and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.