Southwark Metal 121SC12 Snaplock Collar 12 Inches

Product Description

The SOUTHWARK METAL 121SC12 is a 12-inch snaplock collar designed for use in sheet metal ductwork systems. It provides a secure, tool-free connection point where round duct attaches to a plenum, air handler, or trunk line. The snaplock design allows the collar to lock into place quickly, reducing installation time and the need for additional fasteners. This fitting is a standard component in residential and light commercial HVAC duct systems and is typically installed by sheet metal workers or HVAC technicians during new construction or system modification.

The 121SC12 fits into applications where a 12-inch round duct collar is required at a supply or return air connection point. It is suited for low-pressure forced-air systems where a rigid, leak-resistant collar interface is necessary. This collar is commonly installed at plenum takeoffs, fan coil units, or air handler cabinets in residential and light commercial settings.

Key Features

• 12-inch diameter snaplock collar for round duct connections
• Snaplock engagement eliminates the need for additional sheet metal screws at the collar joint
• Designed for use in forced-air HVAC duct distribution systems
• Standard sizing compatible with 12-inch round duct and fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 12-inch round duct systems in residential and light commercial forced-air HVAC applications.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal worker. Shut down the air handling system and confirm the system is de-energized before beginning any ductwork modifications. Ensure the collar seating surface is clean and free of obstructions before engaging the snaplock mechanism. Seal all duct joints with mastic or listed foil tape in accordance with applicable mechanical codes such as the IMC or SMACNA standards.

Technical Specifications

• Diameter: 12 inches
• Type: Snaplock Collar

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 121SC12