6930-00-732-0389 (MHDM40-572)
NSN 6930-00-732-0389 (NIIN 00-732-0389) is a magneti recorder-reproducer head in Federal Supply Class 6930, Operation Training Devices. Manufacturer part number MHDM40-572 (General Semiconductor Inc, CAGE 14936); also referenced as 383929 (Cae USA Inc.).
NIIN assigned January 1963; DEMIL B (USML, demil required); unit of issue EA (each), $44.33 gov standard price.