Southwark Metal 121SC6 Ductboard Snaplock Collar 6 in

Product Description

The SOUTHWARK METAL 121SC6 is a 6-inch ductboard snaplock collar designed to create a secure, airtight connection point where round duct or flex duct transitions into a ductboard plenum or trunk. The snaplock design allows the collar to lock into position without additional fasteners, speeding up installation on both new construction and retrofit HVAC systems. This fitting is a standard component in forced-air distribution systems and is typically installed by licensed HVAC technicians and sheet metal mechanics.

The 121SC6 is suited for residential and light commercial HVAC applications where ductboard (fiberglass duct board) plenums or trunks are used. It provides a clean, repeatable connection for 6-inch round takeoffs from ductboard assemblies. This collar is commonly used in construction and service environments where ductboard fabrication is the primary duct system method.

Key Features

• 6-inch diameter snaplock collar for ductboard installations
• Snaplock design secures the collar in place without additional mechanical fasteners
• Provides a repeatable, consistent takeoff point from ductboard plenums or trunks
• Compatible with standard 6-inch round duct and flexible duct connections
• Suitable for new construction and retrofit HVAC duct systems

Compatibility

Designed as an OEM-style replacement and standard-fit collar for use with fiberglass ductboard plenum and trunk systems requiring 6-inch round takeoff connections.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal mechanics. Shut down the air handling unit and de-energize the system before cutting into or modifying any ductboard assembly. Use a sharp ductboard knife and appropriate cutting template to create a clean hole before inserting the collar. Seal all connections with HVAC-approved foil tape or mastic as required by local mechanical codes.

Technical Specifications

• Diameter: 6 inches
• Connection Type: Snaplock collar
• Application: Ductboard plenum and trunk systems

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 121SC6