{"product_id":"nsi-industries-1670-4-inch-steel-penny-knockout-seal","title":"Nsi Industries 1670 4-inch Steel Penny Knockout Seal","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NSI INDUSTRIES 1670 is a 4-inch steel penny knockout seal designed to close unused knockouts in electrical enclosures, junction boxes, and panel boxes. Fabricated from steel, it provides a durable, code-compliant closure that keeps the interior of the enclosure protected from debris, pests, and accidental contact with live conductors. This type of fitting is a standard consumable on residential and commercial electrical jobs. Electricians keep these on hand for any rough-in or service call where a knockout is opened but not used.\u003c\/p\u003e\n\u003cp\u003eThe 1670 is suited for use in electrical boxes, load centers, conduit bodies, and metal enclosures requiring a 4-inch knockout fill. It is installed wherever an unused 4-inch opening needs to be sealed per NEC requirements for enclosure integrity. Common applications include panel installations, junction box work, and equipment disconnect enclosures.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction for durability and code-compliant knockout closure\u003c\/li\u003e\n  \u003cli\u003e4-inch size fits standard 4-inch knockouts in electrical enclosures\u003c\/li\u003e\n  \u003cli\u003ePenny-style design installs quickly without additional hardware\u003c\/li\u003e\n  \u003cli\u003eSupports NEC requirements for closing unused enclosure openings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard fill fitting for 4-inch knockouts in residential and commercial electrical enclosures, junction boxes, and load centers.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstalled by licensed electricians during panel work, junction box rough-in, or service upgrades. Always de-energize the enclosure and verify the absence of voltage before opening any panel or box. Penny seals are typically pressed or tapped into place by hand or with a flat-faced punch. Work performed inside load centers must comply with applicable NEC requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnockout Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions (L x W x H)\u003c\/strong\u003e: 5.25 inches x 4.75 inches x 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 78174701670\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NSI INDUSTRIES\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1670\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NSI INDUSTRIES","offers":[{"title":"Default Title","offer_id":51383696326962,"sku":"1670","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312676464.jpg?v=1782604717","url":"https:\/\/voomisupply.com\/products\/nsi-industries-1670-4-inch-steel-penny-knockout-seal","provider":"Voomi Supply","version":"1.0","type":"link"}