Southwark Metal 51F_4X10X6 Straight Sheet Metal Boot 4x10x6

Product Description

The SOUTHWARK METAL 51F_4X10X6 is a straight sheet metal duct boot designed to transition from a rectangular duct opening to a round collar for ceiling-mounted register or grille installations. Fabricated from hot-dip galvanized steel, this boot provides corrosion resistance and structural integrity in residential and light commercial HVAC duct systems. The rectangular opening measures 4 inches by 10 inches and connects to a 6-inch diameter round collar. A factory-formed flange on the rectangular end simplifies attachment to the subfloor or ceiling deck and helps create a secure, airtight connection to the register or grille face.

This boot is used in forced-air heating and cooling systems where a rectangular trunk or branch duct must transition to a round takeoff at the ceiling plane. It is suited for new construction and renovation work in residential homes and light commercial buildings. HVAC installers use this fitting in ceiling diffuser layouts where a round-collar register is specified. The straight profile keeps the airflow path direct, minimizing static pressure loss at the termination point. It meets ACCA and SMACNA standards for sheet metal duct construction.

Key Features

• Hot-dip galvanized steel construction resists corrosion in conditioned and unconditioned spaces
• Straight boot profile delivers direct airflow from duct to register with minimal pressure drop
• Factory flange on the rectangular end simplifies register or grille attachment and seating
• 4 inch by 10 inch rectangular opening to 6 inch round collar transition in a single fitting
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fabrication
• Ceiling-mount orientation suitable for standard residential and light commercial layouts

Compatibility

Designed as an OEM-style sheet metal duct fitting compatible with standard 4 inch by 10 inch rectangular duct branch runouts terminating at a 6 inch diameter round ceiling register collar in forced-air HVAC systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with SMACNA duct construction standards and local mechanical code requirements. Power down the air handler and close the system before cutting into existing ductwork. Seal all joints with UL 181-listed mastic or approved metal duct tape to minimize air leakage at the boot connections. Secure the flanged face to the ceiling deck or register box framing before fastening the grille or register.

Technical Specifications

• Material: Hot-Dip Galvanized Steel
• Rectangular Opening (Size A): 4 inches x 10 inches
• Round Collar Diameter (Size B): 6 inches
• Boot Type: Straight, Ceiling
• Inclusions: Flange
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 51F_4X10X6