{"product_id":"invisible-square-head-hinge","title":"Heavy-Duty 3D Adjustable Concealed Invisible Door Hinge (133x20mm, 80kg\/Pair)","description":"\u003cp\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003cbr\u003e\nEngineered for minimalist architectural millwork, flush interior timber doors, and luxury hidden door systems, the Heavy-Duty 3D Adjustable Concealed Hinge (133x20 mm) delivers a completely invisible appearance when the door is closed. Featuring a reinforced four-axis zinc alloy support arm and high-precision steel linkage, this concealed mortise hinge allows effortless 180° full-swing clearance. With its integrated three-dimensional adjustment mechanism, installers can fine-tune door alignment across vertical, horizontal, and depth planes without removing the door leaf from the jamb.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompletely Concealed Flush Aesthetic:\u003c\/strong\u003e Square-head mortise profile installs fully inside the door leaf and jamb, vanishing completely when closed for seamless flush wall integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull 180° Swing Clearance:\u003c\/strong\u003e Four-axis linkage arm geometry allows wide-angle opening up to 180° without binding against adjacent trim or casing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrue 3D Independent Adjustability:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cem\u003eVertical (Up\/Down):\u003c\/em\u003e ±2.5 mm adjustment via precision Allen socket screws.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eHorizontal (Left\/Right):\u003c\/em\u003e ±2.0 mm adjustment for exact frame reveal gaps.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eDepth (In\/Out):\u003c\/em\u003e ±1.0 mm compression adjustment for superior acoustic and draft gasket sealing.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy Load Capacity:\u003c\/strong\u003e Rated for up to 80 kg (176 lbs) per pair (2 hinges), or 100 kg (220 lbs) when using 3 hinges on taller architectural doors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuiet Four-Axis Zinc Alloy Linkage:\u003c\/strong\u003e High-density zinc alloy construction with self-lubricating POM composite bushings ensures silent, friction-free operation and long service life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSleek Snap-On Cover Plates:\u003c\/strong\u003e Includes matching screw cover plates that conceal all mounting screws and adjustment hex sockets for a clean, professional finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 3D Adjustable Concealed Invisible Door Hinge (Square Head \/ Four-Axis)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 133 mm (Length) × 20 mm (Width) \/ 5.24\" × 0.79\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e High-Density Zinc Alloy Arm \u0026amp; Zinc Die-Cast Body with Stainless Steel Pivot Pins\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Options:\u003c\/strong\u003e Matte Black, Satin Silver \/ Brushed Chrome\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Bearing Rating:\u003c\/strong\u003e 80 kg (176 lbs) per 2 hinges \/ 100 kg (220 lbs) per 3 hinges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpening Angle:\u003c\/strong\u003e 180° Maximum Full-Swing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoor Thickness Compatibility:\u003c\/strong\u003e Minimum 35 mm (1-3\/8\") to 50 mm (2\") solid core and engineered wooden doors\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoor Handing:\u003c\/strong\u003e Universal Non-Handed (Field-Reversible for Left-Hand or Right-Hand Swing Doors)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Concealed jib doors, flush interior wooden doors, luxury residential secret doors, folding partition panels, and high-end commercial cabinetry\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWholesale \u0026amp; OEM Capabilities\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB2B Project \u0026amp; Millwork Distribution:\u003c\/strong\u003e Factory-direct supply for architectural door manufacturers, commercial millwork contractors, and interior hardware wholesalers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Custom Finishes:\u003c\/strong\u003e Custom finishes including Brushed Brass, Gunmetal Gray, Oil-Rubbed Bronze, and custom private-label laser etching.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExport Packaging:\u003c\/strong\u003e Individual blister packaging or protective foam-lined inner boxes with hex keys, stainless steel mounting screws, and master export cartons.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ningbo Dimon Metal Products Co.,Ltd","offers":[{"title":"133x20mm  Black 1 pc","offer_id":47362223800459,"sku":null,"price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0575\/0295\/7707\/files\/1f4eb4931d5b97f6d07af60a345e4d37.jpg?v=1790148936","url":"https:\/\/nbdimon.myshopify.com\/en-lb\/products\/invisible-square-head-hinge","provider":"Ningbo Dimon Metal Products Co.,Ltd","version":"1.0","type":"link"}