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 5985-01-564-8190
NSN 5990-00-110-1153
NSN 6145-01-555-8131
NSN 6645-01-566-3205
NSN 4140-01-425-1725
NSN 5950-01-491-4407
NSN 5930-00-150-2333
NSN 6610-00-712-2217
NSN 5998-01-391-6832
NSN 5950-00-454-7384
NSN 5999-00-862-7797
NSN 5950-01-627-5740