Middle Atlantic ALA17A Internal Corner Coupling
Overview
The Middle Atlantic ALA17A is an internal corner coupling designed for use with Middle Atlantic's ALA (aluminum) rack and enclosure framing systems. This hardware fitting joins two ALA extrusion sections at an internal corner, maintaining structural alignment and clean interior geometry in multi-section enclosure builds. If you are assembling or expanding an ALA-series rack frame that requires an interior 90-degree corner joint, the ALA17A is the correct coupling piece — it keeps the frame square and secure without exposed fastener hardware cluttering the interior.
Compatibility
The ALA17A is designed for Middle Atlantic ALA-series aluminum extrusion rack and enclosure framing. It is an internal corner variant, distinct from external corner couplings in the same line. Verify your specific ALA frame model and corner configuration against Middle Atlantic's framing documentation before ordering — internal versus external coupling selection depends on whether the joint is inside or outside the frame perimeter. This fitting is not interchangeable with couplings designed for Middle Atlantic's steel rack product lines.
Installation Notes
As with all rack enclosure hardware, confirm the ALA extrusion channel size matches the ALA17A coupling profile before installation. Internal corner couplings require proper seating in both extrusion channels before fastening — partial engagement will compromise frame rigidity. Consult the Middle Atlantic ALA framing assembly guide for torque specifications and fastener requirements specific to your enclosure configuration.
