5340-00-215-0640 (8564)
NSN 5340-00-215-0640 (NIIN 00-215-0640) is a helical compression spring seat in Federal Supply Class 5340, Hardware, Commercial — a circular item, usually having a flat or grooved flange, boss(es), and/or counterbore, designed to accommodate the end of the spring. Manufacturer part number 8564 (Mid-America Aerotech, LLC, CAGE 0UES3).
Key specs: 25 to 32 rockwell c material hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each), $66.60 gov standard price; export Schedule B 7320.20.5000; ships at 0.03 lb / 0.0087 cu ft.