5325-01-271-9443 (3980 9913980)
5325-01-271-9443 is equivalent to manufacture part number 991. It is a retaining ring and is classified under Federal Supply Class 5325 (5325 - Fastening Devices), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 5325 - Fastening Devices and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.