{"product_id":"hubbell-1040-two-piece-knockout-seal-3-5-inches","title":"Hubbell 1040 Two-piece Knockout Seal 3.5 Inches","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HUBBELL 1040 is a two-piece knockout seal designed to close unused knockout openings in electrical enclosures, junction boxes, and panels. It provides a secure, finished closure that helps maintain the integrity of the enclosure and supports compliance with electrical code requirements for sealing unused openings. The two-piece design allows installation without access to the back of the panel, making it practical for field use. This seal fits a 3.5-inch knockout opening and is typically installed by licensed electricians during new construction, service work, or panel upgrades.\u003c\/p\u003e\u003cp\u003eThis knockout seal is used in commercial and residential electrical installations wherever an unused knockout must be closed. Common applications include load centers, junction boxes, pull boxes, and other metallic or non-metallic electrical enclosures. The two-piece snap-together construction is suited for situations where a standard one-piece seal cannot be inserted from the front of the enclosure alone.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTwo-piece construction allows front-only installation without rear access\u003c\/li\u003e\n\u003cli\u003eFits 3.5-inch knockout openings in standard electrical enclosures\u003c\/li\u003e\n\u003cli\u003eProvides a clean, finished closure for unused panel openings\u003c\/li\u003e\n\u003cli\u003eSupports NEC requirements for sealing unused knockout openings\u003c\/li\u003e\n\u003cli\u003eCompact design for use in tight or crowded enclosure environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement seal for standard 3.5-inch knockout openings found in residential and commercial electrical enclosures, junction boxes, and load centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a licensed electrician. De-energize and lock out the panel or enclosure before beginning work, in accordance with NFPA 70E safe work practices. The two-piece seal is inserted through the knockout opening and snapped together to secure it in place. Verify the installed seal sits flush and does not protrude in a way that could interfere with conductors or other components inside the enclosure.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnockout Opening Size\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign\u003c\/strong\u003e: Two-piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HUBBELL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1040\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HUBBELL","offers":[{"title":"Default Title","offer_id":51383305765170,"sku":"1040","price":28.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312673200.jpg?v=1782592857","url":"https:\/\/voomisupply.com\/products\/hubbell-1040-two-piece-knockout-seal-3-5-inches","provider":"Voomi Supply","version":"1.0","type":"link"}