{"product_id":"autoptim-m12x1-25-lug-nuts-20-pack-black-mag-flat-seat-closed-end-triple-chrome","title":"AUTOPTIM M12x1.25 Lug Nuts 20-Pack Black Mag Flat Seat — Closed-End, Triple Chrome","description":"\u003cp\u003e\u003cstrong\u003eA 20-piece set of AUTOPTIM M12 x 1.25 closed-end, one-piece black mag flat-seat lug nuts engineered to replace OEM flat-seat nuts on select Nissan and Infiniti wheels.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese lug nuts are made for vehicles that require a flat (mag) 90° seat and the M12 x 1.25 thread pitch. Each nut is a single-piece, cold-forged steel construction with triple chrome finish and closed ends to resist corrosion and debris. The dimensions—13\/16\" (21 mm) hex, 1.47\" (37 mm) height, 1.2\" (30 mm) width—match common OEM specifications so you can swap them directly if your wheels use a flat seat design.\u003c\/p\u003e\n\n\u003ch3\u003eWill these lug nuts fit my Nissan or Infiniti?\u003c\/h3\u003e\n\u003cp\u003eIf your vehicle’s wheels use an OEM flat (mag) seat and M12 x 1.25 threads, these AUTOPTIM lug nuts are designed to fit. They are compatible with many Nissan and Infiniti models; always confirm your wheel’s seat type (flat vs conical) before purchasing. Do not use these on wheels that require conical or tapered nuts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eM12 x 1.25 thread pitch—standard for specified Nissan\/Infiniti models\u003c\/li\u003e\n  \u003cli\u003eFlat 90° mag seat—matches OEM flat-seat wheels only\u003c\/li\u003e\n  \u003cli\u003ePhysical size: 13\/16\" (21 mm) hex, 1.47\" (37 mm) height, 1.2\" (30 mm) width\u003c\/li\u003e\n  \u003cli\u003eClosed-end design prevents dirt and moisture ingress\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and secure are these one-piece lug nuts?\u003c\/h3\u003e\n\u003cp\u003eThese nuts use a one-piece construction rather than two-piece designs, reducing potential weak points that can crack or loosen. They are cold-forged and heat-treated for strength, then finished with triple chrome plating for corrosion resistance. The closed end and precision threads help maintain a tight, reliable fit during regular driving.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-piece construction resists cracking and loosening\u003c\/li\u003e\n  \u003cli\u003eCold-forged, heat-treated steel for structural strength\u003c\/li\u003e\n  \u003cli\u003eTriple chrome finish enhances rust resistance and longevity\u003c\/li\u003e\n  \u003cli\u003eClosed ends keep out contaminants and moisture\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact specifications and what should I check before buying?\u003c\/h3\u003e\n\u003cp\u003eConfirm thread pitch, seat style, and the wrench size required to install these nuts. These AUTOPTIM lug nuts are closed-end with an M12 x 1.25 thread, 13\/16\" (21 mm) hex head, 1.47\" (37 mm) height, and 1.2\" (30 mm) width. Make sure your wheels are flat-seat (mag) and that the nut dimensions are compatible with any wheel covers or caps you use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread: M12 x 1.25 (metric)\u003c\/li\u003e\n  \u003cli\u003eSeat: flat 90° (mag) — not compatible with conical seats\u003c\/li\u003e\n  \u003cli\u003eHex size: 13\/16\" (21 mm); overall height: 1.47\" (37 mm)\u003c\/li\u003e\n  \u003cli\u003eSold as a set of 20 black lug nuts, closed-end style\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat kind of maintenance and service can I expect?\u003c\/h3\u003e\n\u003cp\u003eRoutine inspection for tightness and corrosion is recommended as with any wheel fastener. The chrome finish reduces rust buildup, and the closed-end design limits exposure to moisture. AUTOPTIM also offers a 12-month customer support period if you encounter fitment or quality questions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect torque and condition at regular service intervals\u003c\/li\u003e\n  \u003cli\u003eClosed ends reduce internal corrosion—clean exterior only\u003c\/li\u003e\n  \u003cli\u003eAUTOPTIM provides 12 months of customer support\/service\u003c\/li\u003e\n  \u003cli\u003eUse recommended torque values for your vehicle when installing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers who own Nissan or Infiniti vehicles that specifically require M12 x 1.25 flat-seat lug nuts and want a durable, OEM-style replacement in a black mag finish. Ideal for owners replacing worn or corroded nuts, restoring wheel appearance, or upgrading to a closed-end, one-piece design for increased longevity. If your wheels use a tapered\/conical seat, choose a compatible alternative instead.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these lug nuts compatible with tapered (conical) wheels?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These AUTOPTIM lug nuts are flat 90° mag seat only and will not fit tapered\/conical wheel seats.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the thread size and hex key required?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Thread size is M12 x 1.25 and the hex head is 13\/16\" (21 mm) for installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AUTOPTIM","offers":[{"title":"Default Title","offer_id":55166981570903,"sku":"B0D61QGSL3","price":52.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/autoptim-front-packaging-black-lug-nuts.jpg?v=1790374285","url":"https:\/\/britishgarage.co.uk\/products\/autoptim-m12x1-25-lug-nuts-20-pack-black-mag-flat-seat-closed-end-triple-chrome","provider":"British Garage","version":"1.0","type":"link"}