Southwark Metal 55NC_16IN Duct Tee End Cap 16 in No Crimp

Product Description

The SOUTHWARK METAL 55NC_16IN is a no-crimp sheet metal duct tee end cap sized at 16 inches in diameter. Fabricated from hot dip galvanized steel, this cap is designed to close off the open end of a round sheet metal duct tee fitting in low-pressure forced-air HVAC distribution systems. The no-crimp design allows for a straight slip fit onto the duct tee opening, simplifying installation and keeping the connection clean and flush. HVAC sheet metal installers and ductwork mechanics are the primary trades who work with this fitting during new construction or system modification jobs.

This end cap is used in residential and light commercial HVAC ductwork where a branch tee needs to be capped off, either temporarily during phased construction or permanently when a branch run is not needed. The 16-inch diameter makes it appropriate for larger trunk or branch tee outlets common in commercial-grade distribution systems or oversized residential applications. It installs at the tee end to prevent airflow loss and maintain system static pressure balance.

Key Features

• No-crimp design allows straight slip fit onto tee end opening without sheet metal crimping tools
• Hot dip galvanized steel construction provides corrosion resistance for long service life in conditioned and unconditioned spaces
• 16-inch diameter fits standard round duct tee fittings at that nominal size
• Meets ACCA and SMACNA applicable standards for sheet metal duct fittings
• Plain end style keeps the fitting profile simple and compatible with standard duct assembly practices

Compatibility

Designed as an OEM-style sheet metal fitting for use with standard round duct tee assemblies in forced-air HVAC distribution systems requiring a 16-inch no-crimp end cap.

Installation Notes

Installation is performed by licensed sheet metal mechanics or HVAC installers following SMACNA ductwork fabrication and installation standards. The air handling system should be fully powered down and the air handler or furnace shut off before any ductwork modification. Secure the cap to the tee end with sheet metal screws and seal all joints with UL 181-listed duct sealant or mastic per local mechanical code requirements. Do not leave duct joints unsealed in systems subject to static pressure testing.

Technical Specifications

• Size: 16 inches diameter
• Material: Hot Dip Galvanized Steel
• Type: No Crimp
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 55NC_16IN