Southwark Metal 84ST_1-1/2X12 Ductboard Collar Tap 12 in

Product Description

The SOUTHWARK METAL 84ST_1-1/2X12 is a sheet metal ductboard collar tap designed for transitioning between rigid ductboard and round or oval branch runs in forced-air HVAC distribution systems. Constructed from hot dip galvanized steel, this collar provides a corrosion-resistant connection point where duct branches penetrate a ductboard trunk or plenum. The 12-inch size corresponds to the duct opening diameter, and the 1-1/2 inch tab allows for secure mechanical attachment to the ductboard face without additional fasteners. HVAC installers and sheet metal mechanics use this fitting during new construction and retrofit duct system installations.

This collar tap is suited for residential and light commercial forced-air systems where ductboard trunks or plenums serve as the primary air distribution path. It seats against the ductboard surface and creates a defined opening for branch duct connections. The galvanized steel construction holds up in attic, crawlspace, and mechanical room environments where moisture and temperature cycling are common. The 1-1/2 inch tab locks into the ductboard material to maintain alignment and resist pullout under normal system static pressure.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in varied installation environments
• 1-1/2 inch tab secures fitting to ductboard without requiring additional fasteners at the collar flange
• 12-inch opening size for standard round or oval branch duct connections
• Meets ACCA and SMACNA applicable standards for sheet metal duct fittings
• Designed for ductboard trunk and plenum penetrations in forced-air distribution systems

Compatibility

Designed as an OEM-style sheet metal fitting for use with standard ductboard trunk systems in residential and light commercial forced-air HVAC applications meeting ACCA and SMACNA guidelines.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Shut down the air handling unit and confirm the system is de-energized before cutting into any ductboard trunk or plenum. Follow SMACNA ductboard installation guidelines for proper tab engagement depth and ductboard facing integrity. Seal all joints and seams with UL 181B-listed tape or mastic per applicable mechanical code requirements.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 12 inches
• Tab Length: 1-1/2 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 84ST_1-1/2X12