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 5920-01-386-5798
NSN 5905-01-403-2806
NSN 5990-00-455-4864
NSN 6105-01-024-9425
NSN 6240-01-053-0666
NSN 6135-01-230-4399
NSN 5975-00-397-3713
NSN 6645-00-522-4173
NSN 5990-01-235-8404
NSN 6135-01-422-1440
NSN 5985-00-246-3875
NSN 5990-01-298-6616