Southwark Metal 55NC_3IN Duct Tee End Cap 3 Inch No Crimp

Product Description

The SOUTHWARK METAL 55NC_3IN is a no-crimp sheet metal duct tee end cap designed to close off the open branch end of a round sheet metal tee fitting in low-pressure residential and light commercial HVAC duct systems. Constructed from hot dip galvanized steel, this cap resists corrosion and holds up in both supply and return duct applications. The no-crimp design means the cap slides directly onto the duct tee branch without requiring a beaded or crimped male end, simplifying installation and reducing the need for additional fittings. HVAC sheet metal installers and duct fabricators use this cap when a tee branch needs to be blocked off during system balancing, future-use roughing, or final installation.

This end cap is sized for 3-inch diameter round sheet metal ductwork and is intended for use in forced-air HVAC distribution systems where branch termination or temporary closure is required. It is appropriate for residential new construction, HVAC retrofit work, and light commercial applications where round galvanized duct is the standard. It conforms to ACCA and SMACNA applicable standards, making it suitable for installations that must meet these industry guidelines for duct construction and sealing.

Key Features

• Hot dip galvanized steel construction provides corrosion resistance in both supply and return duct environments
• No-crimp design allows direct fit onto tee branch ends without a beaded male end preparation
• 3-inch diameter sizing fits standard round sheet metal duct tee branches
• Conforms to ACCA and SMACNA applicable standards for duct fabrication
• Plain end cap profile keeps installation straightforward with no additional hardware required

Compatibility

Designed as an OEM-style sheet metal component for use with 3-inch diameter round duct tee fittings in standard galvanized sheet metal forced-air duct systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal duct installers. Shut down the air handling unit and confirm the system is de-energized before working inside an active duct system. Seal the cap joint with listed duct sealant or foil tape per SMACNA installation standards to maintain system pressure integrity. Do not use this cap as a permanent high-pressure duct termination without verifying system pressure class ratings.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 3 inches Diameter
• Type: No Crimp
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 55NC_3IN