Mm Manufacturing 601-14X6X8 Register Box Snap-rail Flange

Product Description

The MM Manufacturing 601-14X6X8 is a 601-series register box with a snap-rail flange, designed for residential and light commercial forced-air distribution systems. This box connects round duct to a floor, wall, or ceiling register opening and provides a finished transition point between the duct run and the register face. The snap-rail flange simplifies register seating and retention. At 14 inches by 6 inches by 8 inches nominal, it fits a range of standard opening sizes and accepts round duct connections from 4 inches through 9 inches in diameter. HVAC installers and sheet metal contractors are the primary trades working with this component.

This register box is suited for new construction and replacement installations in residential forced-air systems. It is part of the MM 601 series, which is available in nine standard sizes, giving installers flexibility across a single job with varying duct and register configurations. Typical applications include floor register boxes in wood-framed floors, wall boot applications, and ceiling drops where a snap-rail flange is preferred for fast register attachment.

Key Features

• Snap-rail flange design allows quick register seating without additional fasteners
• Compatible with round duct from 4 inches through 9 inches in diameter
• Nominal 14 x 6 x 8 inch box size suits common standard register opening dimensions
• Part of the 601 series, available in 9 standard sizes for consistent use across a project
• Lightweight at 1.55 pounds for easy single-person handling during rough-in

Compatibility

Designed for connection to round duct ranging from 4 inches through 9 inches in diameter. This box is an OEM-style sheet metal register box intended for standard residential and light commercial forced-air duct systems where a snap-rail flange register connection is specified.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal contractor during rough-in or retrofit work. The system should be powered down and the air handler shut off before cutting into existing ductwork or modifying register openings. Secure the box to framing per local mechanical code requirements and verify the round duct connection is sealed with approved mastic or metal-backed tape before cover installation.

Technical Specifications

• Nominal Box Size: 14 x 6 x 8 inches
• Package Length: 16.25 inches
• Package Width: 16.25 inches
• Package Height: 9.5 inches
• Weight: 1.55 pounds
• Round Duct Connection Range: 4 inches through 9 inches diameter

Standard Information

• Brand: MM Manufacturing
• Manufacturer Part Number: 601-14X6X8