C-5 5″ Collar – Galvanized Steel Duct Connector

The C-5 5″ Collar is a heavy-duty galvanized steel HVAC component designed for creating secure, airtight connections between round ducts and flat HVAC system components like plenum boxes or register boots. Crafted for durability and precision, this 5-inch collar delivers exceptional structural integrity and is a trusted solution in residential, commercial, and industrial ductwork installations.

Fabricated from high-quality galvanized steel, the collar is built to withstand moisture, corrosion, and extreme temperature changes, making it ideal for both indoor and outdoor applications. The 5″ diameter is compatible with standard round ducts, and the rolled edge lip offers extra strength and reduces sharpness for safer handling and faster installation.

Thanks to its uniform circular design, the C-5 collar provides optimal airflow efficiency and minimal pressure loss. It is engineered to maintain system integrity, helping HVAC systems operate more quietly and efficiently. Whether it’s being used in new builds, retrofits, or ventilation repairs, the C-5 collar ensures airtight duct transitions for improved air distribution and energy savings.

The collar’s lightweight structure allows for easy maneuvering and placement, while the robust steel construction ensures a long service life even in demanding environments. It can be fastened using screws, sealants, or metal tape depending on the system’s requirements, offering flexibility during installation.

In high-performance HVAC systems, a secure and corrosion-resistant collar is key—and the C-5 5″ Galvanized Steel Collar delivers exactly that: reliability, compatibility, and performance.