Southwark Metal 84ST2_16IN Ductboard Collar 16 Inch

Product Description

The SOUTHWARK METAL 84ST2_16IN is a round sheet metal ductboard collar start fitting used to transition from a ductboard plenum or air handler cabinet into round duct runs. Constructed from hot dip galvanized steel, this collar provides a corrosion-resistant connection point rated for residential and light commercial forced-air HVAC systems. The 1.5-inch tab design locks into ductboard panels securely without requiring adhesive alone, giving installers a positive mechanical grip. At 16 inches in diameter, this collar is sized for high-volume trunk or main supply applications and is manufactured to ACCA and SMACNA standards.

This fitting is used by HVAC installers and sheet metal mechanics when building out ductboard duct systems from a central air handler or plenum box. It is appropriate for residential new construction, light commercial installations, and HVAC replacement projects where ductboard is the primary duct material. The collar is installed at the starting point of a round duct run branching off a ductboard plenum or trunk section.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in conditioned air environments
• 1.5-inch tab secures fitting mechanically into ductboard panels
• 16-inch diameter serves high-volume main supply or trunk duct connections
• Round profile compatible with standard round duct and fittings
• Manufactured to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style sheet metal fitting for use with ductboard plenum and trunk systems in residential and light commercial forced-air HVAC installations.

Installation Notes

This collar is typically installed by licensed HVAC technicians or sheet metal mechanics during duct system fabrication or replacement. Power down the air handler and verify the system is de-energized before beginning ductwork modifications. Secure the tab fully into the ductboard panel and apply approved duct mastic or foil tape at the joint per SMACNA and local mechanical code requirements. Do not operate the system until all duct connections are properly sealed and supported.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Diameter: 16 inches
• Tab Length: 1.5 inches
• Shape: Round
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 84ST2_16IN