Southwark Metal 55NC_12IN Duct Tee End Cap 12 in No Crimp

Product Description

The SOUTHWARK METAL 55NC_12IN is a no-crimp sheet metal duct tee end cap designed to close off the open branch or run of a tee fitting in low-pressure HVAC duct systems. Fabricated from hot-dip galvanized steel, this cap delivers corrosion resistance suited for both conditioned and unconditioned space installations. The no-crimp design means the cap fits over the duct connection without a beaded crimp edge, which simplifies fitting to certain duct configurations. At 12 inches in diameter, it is sized for standard round duct tee branches commonly found in residential and light commercial forced-air distribution systems. Licensed HVAC technicians and sheet metal mechanics are the primary installers of this component.

This tee end cap is used wherever a branch or end opening on a round duct tee must be sealed off permanently or temporarily during system installation, balancing, or modification. It is appropriate for residential forced-air heating and cooling duct systems as well as light commercial HVAC applications. The 12-inch diameter fits standard round duct tee outlets of the same nominal size. Installation typically occurs during rough-in duct work or system modifications where an active branch is no longer needed.

Key Features

• No-crimp design for straightforward installation on compatible tee fittings without a beaded edge
• Hot-dip galvanized steel construction provides corrosion resistance for long service life
• 12-inch nominal diameter fits standard round duct tee branch openings
• Meets ACCA and SMACNA applicable standards for sheet metal duct fittings
• Suitable for residential and light commercial forced-air HVAC duct systems

Compatibility

Designed as an OEM-style sheet metal fitting for use with 12-inch nominal round duct tee fittings in residential and light commercial HVAC duct systems built to ACCA and SMACNA standards.

Installation Notes

This fitting is installed by licensed HVAC technicians or qualified sheet metal mechanics. Power down the air handling unit and close all dampers before working on the duct system. Secure the cap to the tee opening using sheet metal screws and seal all joints with UL 181-rated foil tape or mastic sealant per SMACNA guidelines to prevent air leakage. Do not force the cap onto a beaded or crimped tee outlet for which it was not designed.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Diameter: 12 inches
• Type: No Crimp
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 55NC_12IN