{"product_id":"autoptim-7-16-20-spline-lug-nuts-20-pack-chrome-closed-end-with-socket-60-taper-cold-forged-steel","title":"AUTOPTIM 7\/16-20 Spline Lug Nuts 20-Pack Chrome Closed-End with Socket — 60° Taper, Cold-Forged Steel","description":"\u003cp\u003e\u003cstrong\u003eAUTOPTIM 7\/16-20 spline lug nuts are a 20-piece set of chrome, closed-end, one-piece wheel nuts supplied with a matching socket for secure, rust-resistant wheel fastening.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese lug nuts are engineered to replace or upgrade factory wheel fasteners on vehicles using a 7\/16-20 thread. Built as one-piece, cold-forged steel units with a conical 60° seat and a chrome finish, the set includes twenty nuts and an installation socket to simplify mounting and removal. The closed-end design keeps contaminants out of the thread, while the supplied socket fits the spline profile for a snug, anti-slip engagement.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these lug nuts fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eThe AUTOPTIM set uses a standard 7\/16-20 UNF thread and a tapered 60° seat, which matches many aftermarket and OEM wheels that specify that thread and seat angle. Confirm thread pitch and seat type on your hub or original lug nut before purchasing to ensure compatibility. The external 17 mm hex helps with socket access where space allows.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread size: 7\/16-20 UNF — verify against your studs\u003c\/li\u003e\n  \u003cli\u003eSeat type: 60° conical\/tapered — common for many wheels\u003c\/li\u003e\n  \u003cli\u003eHex width: 17 mm — standard tool compatibility\u003c\/li\u003e\n  \u003cli\u003eLength\/width: 35 mm length, 20 mm body width — fits typical lug recesses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the construction durable and rust-resistant?\u003c\/h3\u003e\n\u003cp\u003eEach nut is cold-forged and heat-treated as a single solid piece to minimize weak points that can cause cracking under load. A triple-layer chrome finish adds corrosion resistance and simplifies cleaning, especially in regions with road salt or frequent moisture. The closed-end body further protects internal threads from dirt and moisture, helping maintain a reliable, long-term fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-piece forged steel reduces fracture risk\u003c\/li\u003e\n  \u003cli\u003eHeat treatment improves strength and fatigue life\u003c\/li\u003e\n  \u003cli\u003eTriple chrome plating resists corrosion and pitting\u003c\/li\u003e\n  \u003cli\u003eClosed-end design blocks contaminants from threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the included socket help with installation?\u003c\/h3\u003e\n\u003cp\u003eThe kit’s socket is shaped for the spline profile of the nuts so it engages securely without slipping or marring the nut face. Using the supplied socket ensures even torque transfer when tightening or loosening nuts and reduces the chance of rounding. It’s convenient for home mechanics and pros alike and fits standard 1\/2\" drive tools or compatible wrenches depending on your setup.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpline-fit socket prevents stripping and surface damage\u003c\/li\u003e\n  \u003cli\u003eCompatible with common torque tools for correct tightening\u003c\/li\u003e\n  \u003cli\u003eDesigned for easy hand-start then torque to factory spec\u003c\/li\u003e\n  \u003cli\u003eUseful for both installations and routine wheel maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This AUTOPTIM kit is ideal for car owners, hobbyist mechanics, and professional shops replacing worn lug nuts or upgrading to a closed-end, chrome finish for corrosion protection and cleaner looks. Choose this set if your vehicle uses 7\/16-20 studs and a 60° seat, and you want a durable, one-piece nut that resists rust while providing dependable thread engagement. If you’re unsure about fitment, compare these specifications with your vehicle’s manual or consult a wheel specialist prior to installation. AUTOPTIM also offers 12 months of customer support if you need help after purchase.\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 stud locks or aftermarket wheels?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They fit wheels\/studs that use 7\/16-20 thread and a 60° seat; verify your wheel’s seat type and stud pitch before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use a torque wrench with the included socket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The spline socket is designed to work with standard torque tools; follow your vehicle’s torque specs for tightening.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AUTOPTIM","offers":[{"title":"Default Title","offer_id":55167073550679,"sku":"B0FPF8W4B4","price":37.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/autoptim-front-view-chrome-lug-nut-set.jpg?v=1790376532","url":"https:\/\/britishgarage.co.uk\/products\/autoptim-7-16-20-spline-lug-nuts-20-pack-chrome-closed-end-with-socket-60-taper-cold-forged-steel","provider":"British Garage","version":"1.0","type":"link"}