Middle Atlantic C5-ARB31 Adjustable Rail Brackets, 31-Inch Depth

Overview

The C5-ARB31 is a set of adjustable rack rail brackets from Middle Atlantic designed specifically for the C5 Credenza series. At 31 inches (78.7 cm) of usable rail depth, these brackets let you mount deeper rack equipment — think AV receivers, managed switches, or multi-port patch panels — inside a credenza enclosure without forcing the cabinet into a non-standard configuration. If you're dropping rack gear into a C5 and your equipment depth pushes past what fixed rails handle, the C5-ARB31 is the purpose-built solution. The adjustable design means you can dial in rail positioning to match the front-panel alignment your gear requires, avoiding clearance conflicts with doors or cable management channels.

Compatibility

The C5-ARB31 is engineered exclusively for the Middle Atlantic C5 Credenza series. It is not a universal bracket — do not attempt to fit it into other Middle Atlantic enclosure lines (WRK, ERK, or BGR series) without confirming bracket geometry with Middle Atlantic directly. Verify your C5 model's internal rail spacing before ordering; the 31-inch depth variant is the correct choice when your deepest rack-mounted component exceeds approximately 25–28 inches in chassis depth and requires rear rail support. For shallower equipment loads, Middle Atlantic offers shorter-depth ARB variants in the rack accessories category that may be a better fit.

Installation Notes

Shipping weight is 6.2 lbs (2.8 kg) — account for this when calculating total credenza load capacity during rack infrastructure planning. Adjust rail position before final equipment mounting; repositioning brackets under load risks thread damage on the mounting hardware. No power or data connections are involved — installation is mechanical only. Consult the C5 credenza's documentation for torque specs on rail fasteners; Middle Atlantic does not publish torque values specific to the ARB31 independently.