Southwark Metal 51F121210SD Register Boot 12x12x10

Product Description

The SOUTHWARK METAL 51F121210SD is a 601-pattern register boot designed for residential and light commercial HVAC duct systems. This fitting transitions from a rectangular duct collar to a floor, wall, or ceiling register opening, directing conditioned air into the living space. The 51F121210SD measures 12 inches by 12 inches at the register face and 10 inches at the duct collar, making it a standard fit for common supply-air trunk and branch configurations. HVAC sheet metal installers and duct fabricators are the typical tradespeople who specify and install this component.

This register boot is used in forced-air supply duct systems in residential construction and light commercial applications. It mounts at the terminal end of a supply branch run, connecting the duct work to a floor, sidewall, or ceiling register grille. The 601-pattern designation refers to the standard rectangular-to-rectangular boot geometry widely used in conventional residential duct layouts. It is suited for new construction installs as well as replacement work where an existing boot has been damaged or needs upsizing.

Key Features

• 601-pattern rectangular register boot for standard supply-air duct terminations
• 12-inch by 12-inch register face opening sized for common residential register grilles
• 10-inch duct collar depth for connection to branch duct runs
• Fabricated by SOUTHWARK METAL, a recognized manufacturer of HVAC sheet metal fittings
• Suitable for floor, sidewall, or ceiling register applications depending on orientation

Compatibility

Designed as an OEM-style replacement or new-construction fitting compatible with standard rectangular supply-air duct systems using a 12-inch by 12-inch register opening and a 10-inch duct collar connection.

Installation Notes

Installation should be performed by a qualified HVAC technician or sheet metal installer in accordance with local mechanical codes and SMACNA duct construction standards. The supply air system should be fully de-energized and the air handler or furnace shut down before fitting replacement or installation. Secure the boot to the duct collar using sheet metal screws and seal all joints with UL-listed foil tape or mastic sealant to prevent air leakage. Verify register face alignment and secure the grille according to the register manufacturer instructions before restoring system operation.

Technical Specifications

• Register Face Size: 12 inches x 12 inches
• Duct Collar Size: 10 inches
• Pattern: 601

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 51F121210SD