5855-01-447-1627 (584-40C1F4L60N2(JJ))
5855-01-447-1627 is equivalent to manufacture part number 4666-727. It is a lens cap and is classified under Federal Supply Class 5855 (5855 - Night Vision Equipment), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 5855 - Night Vision Equipment and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.