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 5985-01-448-5197
NSN 6620-01-581-5301
NSN 5990-00-111-3614
NSN 5950-00-205-1854
NSN 5960-01-432-6038
NSN 6610-01-529-2337
NSN 5975-01-454-9228
NSN 6145-00-329-5323
NSN 6620-01-446-2258
NSN 5945-01-435-7148
NSN 6135-01-031-8078
NSN 6105-00-274-5460