4810-01-222-0422 (H.S.98-20Z)
4810-01-222-0422 is equivalent to manufacture part number 87-439-2. It is a valve disk and is classified under Federal Supply Class 4810 (4810 - Valves, Powered), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 4810 - Valves, Powered and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.