Southwark Metal 55NC_5IN Duct Tee End Cap 5 in No Crimp

Product Description

The SOUTHWARK METAL 55NC_5IN is a sheet metal duct tee end cap designed to terminate the branch opening of a tee fitting in residential and light commercial HVAC duct systems. Constructed from hot dip galvanized steel, this cap provides a durable, corrosion-resistant closure for 5-inch diameter duct tee branches. The no-crimp design simplifies installation by eliminating the need for a crimped male end, allowing it to slip directly over the tee branch opening. HVAC technicians and sheet metal installers use this cap to seal unused tee branches during system layout or to permanently close off a branch run during duct modifications.

This tee end cap is suited for forced-air supply and return duct systems where branch openings require a clean, secure termination. It is commonly installed during new construction ductwork fabrication, system rebalancing, or retrofit projects where an existing tee branch is no longer in use. The galvanized steel construction meets ACCA and SMACNA standards, making it appropriate for use in code-compliant duct systems across residential and light commercial applications.

Key Features

• Hot dip galvanized steel construction provides corrosion resistance in air-handling environments
• No-crimp design fits directly over the tee branch opening without requiring a crimped male end
• 5-inch diameter sizing matches standard round duct tee branch outlets
• Meets ACCA and SMACNA applicable standards for sheet metal duct fabrication
• Provides a clean, permanent closure for unused or decommissioned tee branch runs

Compatibility

Designed as an OEM-style sheet metal fitting for use with 5-inch diameter round duct tee branches in forced-air HVAC systems fabricated to ACCA and SMACNA standards.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal workers. Power down the air handling unit and verify the system is de-energized before working inside the duct system. Secure the cap with sheet metal screws and seal all joints with UL 181-listed duct tape or mastic sealant per SMACNA guidelines to maintain system air tightness. Do not leave branch openings unsealed, as air leakage will reduce system efficiency and may create pressure imbalances.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Diameter: 5 inches
• Type: No Crimp
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 55NC_5IN