5855-00-125-0774 (SMC657309)
5855-00-125-0774 is equivalent to manufacture part number SMC657309. It is a optical element retaining ring 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.