Middle Atlantic 5-RS20 Slim Steel Bottom Runner Kit

Overview

The Middle Atlantic 5-RS20 is a replacement or supplemental bottom runner kit for Middle Atlantic 5-series rack enclosures. At 20 inches deep, 1.5 inches wide, and just 0.25 inches tall, these steel runners provide the structural base rail support that keeps rack equipment seated squarely and sliding cleanly — a practical fix when original runners are damaged or when building out a new 5-series enclosure that ships without them. If you're commissioning a rack and need the floor-contact rail pair to complete the assembly, the 5-RS20 is the part to spec.

Compatibility

Designed specifically for Middle Atlantic 5-series rack bases and enclosure frames requiring a 20-inch-depth runner profile. Verify your enclosure's runner depth before ordering — Middle Atlantic offers this kit in multiple depth configurations, and a runner mismatched to your cabinet depth will not seat correctly. Confirm the 20 in (50.8 cm) depth matches your enclosure's internal floor rail spec before purchasing.

Installation Notes

The slim 0.25-inch height profile is intentional — it minimizes interference with equipment positioned at the base of the rack. The 1.5-inch width is standard for the 5-series rail slot, so no drilling or modification should be required on a compatible enclosure. Verify the runner orientation before final seating; the slim steel construction means there is no visible top/bottom differentiation at a glance.