Middle Atlantic STL Ext. BOX Open Base IV - V5737A

Middle Atlantic V5737A STL Open Base Extension Box

Overview

The Middle Atlantic V5737A is an ivory open base extension box fitting designed for the 500 and 700 series steel raceway systems. Where a standard base fitting doesn't provide enough depth or transition clearance at the wall entry point, the V5737A adds a 1-inch extension layer — a compact fix that keeps cable routing clean without reworking the entire raceway run. At 5.5 in × 5.5 in × 1 in (14 cm × 14 cm × 2.5 cm), it matches the footprint of the base fitting it extends. TAA compliant, making it eligible for government and federally funded installations where country-of-origin requirements apply.

Compatibility

Designed for use with Middle Atlantic 500 and 700 series open-base steel raceway fittings. Pairs with the standard base covers and extension components within the Middle Atlantic raceway line. Verify the base fitting series before ordering — the 500 and 700 series share this extension box, but other Middle Atlantic raceway series use different fitting geometries and are not compatible. Ivory color matches the standard ivory finish across the 500/700 series cable management product family; verify finish consistency if mixing with other raceway runs on the same wall.

Installation Notes

Mounts as an extension layer between the wall surface and the primary base fitting. The 1-inch depth adds clearance for conduit transitions or wire bundle thickness at the entry point. No special tools specified beyond standard raceway installation hardware. Confirm wall surface flatness — any gap between the extension box and the mounting surface will affect the fit of the outer cover.