4820-00-875-4587 (7714548P6REVC)
NSN 4820-00-875-4587 (NIIN 00-875-4587) is a safety relief valve in Federal Supply Class 4820, Valves, Nonpowered — a valve designed to automatically release excessive pressures. Manufacturer part number 7714548P6REVC (Lockheed Martin Corporation, CAGE 03538); also referenced as D559B-2M-35 (Circor Aerospace, Inc.).
Key specs: 200 psi maximum single response operating pressure; full characteristics table below. NIIN assigned January 1960; DEMIL A (none required); unit of issue EA (each), $55.94 gov standard price; export Schedule B 8481.40.0000; ships at 0.35 lb / 0.0094 cu ft.