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 5975-01-481-9172
NSN 6645-01-392-4788
NSN 5935-00-246-5280
NSN 6620-00-176-5722
NSN 5950-01-133-9577
NSN 6610-00-175-5620
NSN 6620-01-512-2016
NSN 5960-01-530-0581
NSN 6620-01-566-1142
NSN 6610-00-252-3405
NSN 5999-00-792-0561
NSN 2925-01-654-4621