Damper regulator hardware|Fast installing hammer-on design|For use on 30 to 24 ga galvanized steel|Standard 5/16 in threads|Not for stove pipe: use only for air handling applications where temperature does not exceed 350 deg F
Malco Damper Wing Nut, Accessory Type: Damper Wing Nut, For Use with: DR69/DR70/DR71 Damper Regulator Hardware, Import