A cast iron or sheet metal plate designed to be installed in a boiler, heater, stove, or furnace flue pipe to control the draft, and/or in an air duct to control the passage of air. Excludes valve, butterfly.
NSN 6645-01-571-8578
NSN 5999-01-439-5711
NSN 5945-01-366-0298
NSN 5960-00-266-6741
NSN 5905-00-378-0929
NSN 6610-01-569-4084
NSN 6620-00-963-1319
NSN 5920-00-930-2307
NSN 5985-01-323-9556
NSN 5965-01-337-0250
NSN 5965-01-356-2047
NSN 5925-01-018-1375