Mm Manufacturing 601-12X6X7 Register Box Snap-rail Flange

Product Description

The MM Manufacturing 601-12X6X7 is a 601 series register box with a snap-rail flange, designed for residential and light commercial HVAC duct systems. This sheet metal register box connects supply air runs to floor, wall, or ceiling registers, providing a clean termination point between the duct and the register face. The snap-rail flange simplifies register attachment and reduces installation time. Weighing 1.3 pounds and sized at 12 x 6 x 7 inches, this box ships ready for field installation by HVAC technicians and sheet metal contractors.

This register box is suited for residential forced-air heating and cooling systems where a round duct feeds a rectangular register opening. It is part of the MM Manufacturing 601 series, which is available in nine standard sizes to accommodate round duct connections ranging from 4 inches through 9 inches in diameter. This makes it adaptable across a range of trunk-and-branch and radial duct layouts commonly found in new construction and retrofit applications.

Key Features

• Snap-rail flange design for secure, tool-assisted register attachment
• Accepts round duct connections from 4 inches through 9 inches in diameter
• Part of a nine-size 601 series for flexible duct layout options
• Nominal 12 x 6 x 7 inch register box opening dimensions
• Lightweight at 1.3 pounds for easy single-tech handling during installation

Compatibility

Designed for connection to round duct ranging from 4 inches through 9 inches in diameter. Compatible with standard residential register faces that mount to snap-rail flanges. Part of the MM Manufacturing 601 series available in nine sizes.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Shut down the air handler and de-energize the system before cutting into existing ductwork or securing the box in place. Seal all duct connections with UL-listed duct sealant or mastic per local mechanical code requirements to prevent air leakage. Secure the register box to the framing or subfloor according to the register orientation before attaching the register face to the snap-rail flange.

Technical Specifications

• Nominal Size: 12 x 6 x 7 inches
• Length: 8.25 inches
• Width: 14.25 inches
• Height: 9.25 inches
• Weight: 1.3 pounds
• Round Duct Diameter Range: 4 inches through 9 inches
• Series: 601
• Flange Type: Snap-Rail

Standard Information

• Brand: MM Manufacturing
• Manufacturer Part Number: 601-12X6X7