Southwark Metal 105020 Beaded End Duct Collar 20 Inch

Product Description

The SOUTHWARK METAL 105020 is a beaded end (B.E.) duct collar designed for round duct connections in forced-air HVAC systems. The beaded end profile creates a positive stop that helps seat flex duct or rigid round duct securely, reducing the chance of slippage during installation. At 20 inches in diameter, this collar suits larger trunk-to-branch or plenum takeoff connections commonly found in commercial light construction and larger residential applications. HVAC sheet metal installers and duct fabricators are the primary trades working with this fitting.

This collar is used where a round duct branch connects to a plenum, air handler cabinet, or trunk line. The 20-inch size is typical in commercial rooftop unit installations, large residential forced-air systems, and custom duct fabrication shops that require a pre-formed collar fitting. It is installed as part of a supply or return air distribution system to maintain airflow integrity at the connection point.

Key Features

• Beaded end profile provides a positive stop for secure duct seating
• 20-inch diameter suits larger commercial and residential forced-air duct systems
• Pre-formed collar design speeds up field installation and reduces fabrication time
• Compatible with standard round flex duct and rigid spiral duct connections

Compatibility

Designed as an OEM-style sheet metal fitting for use in round duct distribution systems requiring a 20-inch beaded end collar connection.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Power down the air handling unit and confirm the system is de-energized before making any duct connections. Secure the collar with sheet metal screws and seal all joints with UL-listed foil tape or mastic sealant in accordance with local mechanical codes and SMACNA ductwork standards. Do not rely on tape alone as a primary mechanical fastener.

Technical Specifications

• Diameter: 20 inches
• End Type: Beaded End
• Fitting Type: Duct Collar

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 105020