Southwark Metal 121SC16 Ductboard Snaplock Collar 16 in

Product Description

The SOUTHWARK METAL 121SC16 is a 16-inch ductboard snaplock collar designed for use in fibrous glass ductboard HVAC systems. This fitting creates a secure, airtight connection point where duct runs terminate or transition at equipment openings, plenums, or registers. The snaplock design allows the collar to engage and lock in place without additional fasteners, speeding up installation and reducing labor time. HVAC sheet metal installers and ductwork fabricators use this collar when building or connecting ductboard systems in residential and light commercial applications.

This collar is sized for 16-inch ductboard applications and is intended for installation at the inlet or outlet of air handlers, furnaces, or duct transitions where ductboard panels are the primary duct material. It provides a clean, rigid connection point that maintains duct integrity and supports proper airflow at the fitting junction. Snaplock collars of this type are a standard component in fibrous glass ductboard system construction and are commonly specified on new residential HVAC installations and replacement duct system projects.

Key Features

• 16-inch diameter fits standard ductboard system openings of that size
• Snaplock engagement secures the collar without additional mechanical fasteners
• Designed for fibrous glass ductboard HVAC duct construction
• Supports airtight connections at equipment connections, plenums, and transitions
• Rigid construction maintains duct opening shape and alignment during system operation

Compatibility

Designed as an OEM-style fitting for 16-inch fibrous glass ductboard HVAC systems in residential and light commercial construction.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal installers working with fibrous glass ductboard systems. Shut down and de-energize the HVAC system before making any duct connections. Secure the collar per ductboard manufacturer guidelines and applicable SMACNA standards, and seal all joints with approved duct tape or mastic rated for fibrous glass ductboard systems. Do not modify the collar opening or force fitment into an incompatible duct size.

Technical Specifications

• Diameter: 16 inches
• Connection Type: Snaplock
• Application: Fibrous Glass Ductboard HVAC Systems

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 121SC16