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 5895-01-422-5477
NSN 4140-00-089-0490
NSN 6645-01-391-1983
NSN 5895-01-212-3996
NSN 7035-01-474-9537
NSN 5985-01-460-3502
NSN 5935-00-867-1185
NSN 5920-01-104-4332
NSN 5960-00-252-6274
NSN 6320-01-006-6138
NSN 6220-01-013-8445
NSN 6650-01-441-3142