The NESCO 52C1 is a 4" square blank cover plate built for professional electricians who need a clean, code-compliant way to seal unused or junction electrical boxes. Whether you're finishing a rough-in, capping off a decommissioned circuit, or protecting a junction box during construction, this blank cover keeps the box sealed against dust, moisture, and debris while delivering a professional finish. A reliable truck-stock staple that belongs on every electrical job site.

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