Southwark Metal 51F_6X12X8 Straight Sheet Metal Boot 6x12x8

Product Description

The SOUTHWARK METAL 51F_6X12X8 is a straight sheet metal boot with an integrated flange, designed to connect rectangular duct to a round collar in forced-air HVAC distribution systems. Built from hot dip galvanized steel, this fitting transitions from a 6 inch by 12 inch rectangular opening to an 8 inch round collar. The flanged design provides a secure mounting surface for register or grille attachment at ceiling installations. HVAC installers and sheet metal contractors use this fitting in both new construction and retrofit duct systems where a straight boot configuration is required at the ceiling plane.

This boot fitting is suited for residential and light commercial forced-air systems where a ceiling-mounted supply or return register is required. The straight configuration positions the round collar perpendicular to the rectangular duct opening, making it appropriate for ceiling drop-in or flush-mount register applications. The integrated flange seats flush against the ceiling surface to frame the register opening cleanly. Installers working with standard trunk-and-branch or plenum duct layouts will find this fitting compatible with common rectangular duct sizing and 8 inch round collar registers and grilles.

Key Features

• Hot dip galvanized steel construction resists corrosion in typical HVAC duct environments
• Straight boot configuration for ceiling register installations
• Integrated flange provides a finished mounting surface for registers and grilles
• Transitions from a 6 inch by 12 inch rectangular duct to an 8 inch round collar
• Meets ACCA and SMACNA applicable standards for sheet metal duct fittings

Compatibility

Designed as an OEM-style sheet metal duct fitting for ceiling straight boot applications in residential and light commercial forced-air HVAC duct systems requiring a 6 inch by 12 inch rectangular to 8 inch round transition.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with SMACNA duct construction standards and local mechanical codes. Shut down the air handler or furnace and confirm the system is de-energized before working in the duct system. Secure the boot to the rectangular duct using drive cleats, S-clips, or sheet metal screws as appropriate for the application, and seal all joints with UL 181-listed duct sealant or mastic. Ensure the flange seats flush against the ceiling material before securing the register or grille.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size A (Rectangular Opening): 6 inches x 12 inches
• Size B (Round Collar): 8 inches diameter
• Type: Straight, Ceiling
• Inclusions: Flange
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 51F_6X12X8