5670-00-784-0134 (2INCHREGULAR)
NSN 5670-00-784-0134 (NIIN 00-784-0134) is an air circulating ventilator in Federal Supply Class 5670, Building Components, Prefabricated — a device designed to allow ventilation without excessive drafts. Manufacturer part number 2INCHREGULAR (Midget Louver Co, CAGE 07918); also referenced as 9185590 (Us Army Aviation And Missile Command).
NIIN assigned April 1969; DEMIL A (none required).