2815-00-529-9921 (A1352-030-6EA-X4070-030-4EA)
2815-00-529-9921 is equivalent to manufacture part number 4F9876. It is a piston ring set and is classified under Federal Supply Class 2815 (2815 - Diesel Engines), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 2815 - Diesel Engines and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.