6625-00-643-8523 (214-2A)
NSN 6625-00-643-8523 (NIIN 00-643-8523) is a tuned cavity in Federal Supply Class 6625, Electrical And Electronic Properties Measuring And Testing Instruments — an inclosure, with a conductive inner wall, whose resonant frequency is determined by its internal dimensions. Manufacturer part number 214-2A (Amerac Inc, CAGE 96955); also referenced as 214-2B (Amerac Inc).
NIIN assigned January 1963; export Schedule B 9030.90.8030.