5340-00-574-7843 (WMR2041-2X)
5340-00-574-7843 is equivalent to manufacture part number 121SB21. It is a gasket and is classified under Federal Supply Class 5340 (5340 - Commercial Hardware), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 5340 - Commercial Hardware and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.