6695-00-564-9500 (MILT25620TYPEMQ1)
NSN 6695-00-564-9500 (NIIN 00-564-9500) is an oxygen mask tester in Federal Supply Class 6695, Combination And Miscellaneous Instruments. Manufacturer part number MILT25620TYPEMQ1 (Military Specifications, CAGE 81349); also referenced as MIL-T-25620, MQ-1, MQ-1A (Military Specifications); 1714 (Winding Specialists Co., Inc); OMHT (Jaidinger Mfg Co Inc); 6503 (Tec Air Service Inc), plus 1 more in the reference table below.
NIIN assigned January 1963; DEMIL A (none required); ESD/EMI-sensitive; ships at 45 lb / 8.8539 cu ft.