C-8 8″ Collar – Galvanized Steel Duct Connector for HVAC Systems

The C-8 8″ Collar is a precision-engineered galvanized steel duct connector designed to create strong, airtight connections between round ductwork and flat HVAC components such as plenum boxes or register boots. This 8-inch collar is built for performance and durability, making it an essential fitting for residential, commercial, and industrial ventilation systems.

Constructed from heavy-duty galvanized steel, the collar resists moisture, corrosion, and thermal stress, allowing it to withstand harsh conditions both indoors and outdoors. The rolled-edge lip improves safety during handling, reinforces structural strength, and simplifies the installation process. Its uniform circular geometry promotes smooth airflow with minimal turbulence or pressure loss, optimizing HVAC efficiency and reducing system noise.

Compatible with a wide range of rigid or flexible ducts, the C-8 collar is widely used in both new installations and retrofit projects. Its lightweight build ensures easy placement without compromising strength, while its rigid construction offers long-lasting performance even in demanding environments. Installation is straightforward and can be secured using sheet metal screws, duct sealants, or foil tape depending on the job’s requirements.

Designed to maintain airtight connections, improve air distribution, and enhance overall HVAC performance, the C-8 galvanized collar is a dependable solution for duct transitions in ventilation, heating, and cooling applications.