{"product_id":"national-marker-n183590-steel-chain-door-lock","title":"National Marker N183590 Steel Chain Door Lock","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NATIONAL MARKER N183590 is a steel chain door lock designed to secure entry doors while allowing controlled partial opening. This economical fastener mounts to the door and door frame, enabling occupants to screen visitors without fully releasing the latch. The unit is constructed from steel for reliable everyday use and ships one per pack. It suits residential installations in houses and apartments where a simple, low-cost security solution is needed. Installation requires only basic hand tools and minimal hardware.\u003c\/p\u003e\n\u003cp\u003eThis chain door fastener is intended for residential applications including single-family homes and apartment units. It functions as a secondary security measure on hinged entry doors, allowing the door to open a few inches so an occupant can verify who is outside before granting full access. The part corresponds to National catalog model V807.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction provides durable, corrosion-resistant performance for interior door applications\u003c\/li\u003e\n  \u003cli\u003eAllows door to open partially for controlled visitor screening without releasing the full latch\u003c\/li\u003e\n  \u003cli\u003eEconomical design suited for high-volume residential installations\u003c\/li\u003e\n  \u003cli\u003eSold individually, one unit per pack\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.31 pounds per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard residential chain door fastener suitable for typical hinged interior and entry doors in houses and apartments.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a general contractor, handyman, or knowledgeable property maintenance technician using basic hand tools including a drill and screwdriver. The door and frame must be solid enough to accept the mounting screws securely. Ensure the door is closed and no load is on the chain before fastening hardware. Follow local building codes regarding secondary security devices on egress doors.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.31 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 00038613183599\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: NATIONAL MARKER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N183590\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL MARKER","offers":[{"title":"Default Title","offer_id":51342712242482,"sku":"N183590","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310550218.jpg?v=1782004338","url":"https:\/\/voomisupply.com\/products\/national-marker-n183590-steel-chain-door-lock","provider":"Voomi Supply","version":"1.0","type":"link"}