APC NetShelter SX 42U 600mm Wide Recessed Rail Kit

The APC AR7503 is a recessed rail kit designed for NetShelter SX enclosures that stand 42U tall and measure 600 mm wide. By setting the rails back inside the cabinet, it creates the right equipment depth for servers, switches, or power units without blocking airflow or cable paths.

Each rail uses strong steel and a black finish that matches the rest of the enclosure. At just 8.02 lb, it adds the stability you need without burdening the cabinet frame. The rails mount at the front and keep equipment secure even in densely packed racks.

With physical dimensions of 39.6 in high, 2.9 in wide, and 2.3 in deep, the kit suits data centers, edge closets, or office server rooms where every inch counts. The recessed design makes space for rear cable management and accessories, which is especially useful in 600 mm footprint racks.

Installation is straightforward. APC includes a clear guide and the necessary hardware, so a technician can complete the job during a single maintenance window. Once in place, the rails allow smooth equipment changes and help prevent port strain.

APC backs the AR7503 with a two-year repair or replacement warranty, giving you confidence that the mounting solution will stay reliable over the long term.

• Built for 42U NetShelter SX enclosures that are 600 mm wide
• Recessed rail design delivers flexible equipment depth
• Black finish matches cabinet aesthetics
• Size: 39.6 in H × 2.9 in W × 2.3 in D
• Lightweight construction at 8.02 lb
• Includes installation guide and mounting hardware
• Two-year APC warranty for repair or replacement