Hammond Universal 4 Post Rack Adapter Rails

The Hammond Universal 4 Post Rack Adapter Rails (URR Series) are a versatile mounting solution designed to convert enclosures, cabinets, or 2-post racks into fully functional 4-post rack systems. Ideal for IT, telecom, and AV installations, these adapter rails allow for secure mounting of standard 19-inch rack equipment in environments where traditional 4-post racks are not available.

Constructed from heavy-duty steel (typically 12–14 gauge depending on model), these rails provide the strength and stability required to support switches, servers, patch panels, and other rack-mounted devices. The universal design supports EIA-310 compliant mounting, ensuring compatibility with a wide range of rack hardware and accessories.

These rails are available in multiple rack unit (U) sizes, allowing installers to customize configurations based on equipment height requirements. Designed for flexibility, they can be installed in cabinets, wall enclosures, or open frame racks, making them a go-to solution for retrofits, custom builds, and space-constrained deployments.

Key Features

• Converts cabinets or 2-post racks into 4-post mounting systems
• Compatible with standard 19″ EIA rack equipment
• Available in multiple sizes (4U, 10U, 14U, 18U, etc.)
• Heavy-duty steel construction for durability and load support
• Supports 10-32, 12-24, and square hole mounting configurations
• Ideal for retrofits, custom enclosures, and rack conversions
• Black powder-coated finish for corrosion resistance

The Hammond Universal 4 Post Rack Adapter Rails are one of the most flexible rack accessories you can use. Whether you’re upgrading an enclosure, converting a rack, or building a custom solution, these rails provide standardized mounting, strong support, and maximum compatibility—exactly what installers need for clean, reliable deployments.