Questions about Fans, Air Circulators, and Blower Equipment
What does federal supply class 4140 cover?
Federal supply class 4140 covers fans, air circulators, and blower equipment. Items filed here include tubeaxial fans.
How is a part in federal supply class 4140 identified?
A fan is identified by its NSN and item name; the record carries the characteristics on file and the manufacturers cross-referenced to it. Each item in the class has its own National Stock Number (NSN) record, listed above.