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 5960-01-429-5897
NSN 5930-01-295-3392
NSN 5960-01-543-0235
NSN 6110-00-108-6478
NSN 5895-00-051-8347
NSN 6240-00-299-9819
NSN 5950-01-160-8176
NSN 6320-00-379-4695
NSN 5985-00-734-6701
NSN 5990-01-588-3999
NSN 6645-00-220-9246
NSN 2925-00-355-5130