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The A51-1912DT is a hinged inspection window cover manufactured by Hoffman Enclosures, Inc. It is designed for use with NEMA 4X enclosures and features four non-metallic corner screws for secure attachment. The exterior dimensions are 19.20 inches in length, 11.89 inches in width, and 6.93 inches in depth. The material composition is fiberglass, providing durability for industrial applications.
Verify compatibility with specific NEMA 4X enclosure models before purchase. Confirm that the required cutout dimensions match the 19.20 x 11.89 inch specification. Ensure the mounting hardware includes the specified non-metallic corner screws for proper sealing and structural integrity.
Select this component when visual monitoring of internal equipment is required while maintaining a sealed environment. It is suitable for applications needing frequent inspection without compromising the NEMA 4X rating. Consider the fiberglass material for resistance to corrosion and chemicals compared to metal alternatives.
This part belongs to the APO DTHPL series of enclosures by Hoffman Enclosures. These products are engineered for robust performance in demanding industrial settings. The series emphasizes protection against water, dust, and corrosive agents, making it a reliable choice for critical infrastructure and process control environments.
No direct public substitute part numbers are confirmed for this specific model. Users should verify dimensional compatibility with existing enclosure frames if considering alternative brands or modified designs.

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