{"product_id":"evil-energy-6an-to-3-8in-5-16in-quick-disconnect-fuel-adapter-37-flare-aluminum-1500-psi","title":"EVIL ENERGY 6AN to 3\/8in \u0026 5\/16in Quick-Disconnect Fuel Adapter — 37° Flare Aluminium, 1500 PSI","description":"\u003cp\u003e\u003cstrong\u003eEVIL ENERGY's 6AN male to 3\/8\" \u0026amp; 5\/16\" quick-disconnect female fuel fitting is a compact aluminum adapter engineered to join a 6AN threaded line to either 3\/8\" or 5\/16\" quick-disconnect fuel connectors with a 37° flare seal.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis fitting converts a 6AN (9\/16-18UNF) male threaded feed into a dual-ID quick-disconnect female interface, letting you connect common fuel hoses or sensors without custom fabrication. Built from 6061-T6 aluminum with a plastic spring lock and a 37° flare sealing surface, it balances corrosion resistance, light weight, and a high working pressure rating suitable for many performance and maintenance applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this adapter ensure a leak-resistant connection?\u003c\/h3\u003e\n\u003cp\u003eThe adapter relies on a 37° flare sealing geometry that compresses against the mating flare to form a metal-to-metal seal, minimizing reliance on soft seals. A plastic-encapsulated spring lock secures the quick-disconnect female halves, keeping connections engaged under vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e37° flare angle for a proven pressure seal\u003c\/li\u003e\n  \u003cli\u003eMetal-to-metal contact reduces soft-seal failure points\u003c\/li\u003e\n  \u003cli\u003ePlastic spring lock prevents accidental disconnection\u003c\/li\u003e\n  \u003cli\u003ePrecision 9\/16-18UNF thread for tight engagement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat temperature and pressure limits can I expect in real use?\u003c\/h3\u003e\n\u003cp\u003eThis fitting is rated to operate up to 1500 psi and across a broad temperature range from -40°F to 250°F, covering most automotive fuel delivery and return systems. Those limits make it suitable for typical EFI and mechanical fuel setups, though extreme racing or specialty fluids may need higher-rated components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorking pressure: 1500 psi\u003c\/li\u003e\n  \u003cli\u003eOperating temperature: -40°F to 250°F\u003c\/li\u003e\n  \u003cli\u003eSuitable for gasoline and many blended fuels used in automotive systems\u003c\/li\u003e\n  \u003cli\u003eNot intended for applications beyond specified temperature\/pressure ratings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich materials are used and why does that matter?\u003c\/h3\u003e\n\u003cp\u003eThe body is machined from 6061-T6 aluminum, a common choice for strength, corrosion resistance, and lightness in automotive fittings. The spring lock uses a durable plastic to reduce galling on mating parts while still providing reliable locking action.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6061-T6 aluminum: durable and corrosion-resistant\u003c\/li\u003e\n  \u003cli\u003ePlastic spring lock: prevents metal-on-metal wear\u003c\/li\u003e\n  \u003cli\u003ePrecision machining ensures consistent thread and flare geometry\u003c\/li\u003e\n  \u003cli\u003eLightweight for race and street builds where mass matters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installations or systems is this adapter used with?\u003c\/h3\u003e\n\u003cp\u003eIt’s commonly used where a 6AN line must interface with smaller quick-disconnect fuel fittings—ideal for fuel rails, LS swaps, return lines, transmission coolers, and inline sensors. The dual-ID female design lets installers choose between 3\/8\" and 5\/16\" hose IDs without separate adapters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFuel rails and EFI return lines\u003c\/li\u003e\n  \u003cli\u003eLS engine swaps and aftermarket fuel systems\u003c\/li\u003e\n  \u003cli\u003eTransmission cooler feed\/return when using compatible fittings\u003c\/li\u003e\n  \u003cli\u003eFuel sensors and inline diagnostic ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Technicians, tuners, and DIY enthusiasts who need a compact, reliable way to adapt a 6AN male connection to standard quick-disconnect female fuel lines. If you require a lightweight, corrosion-resistant adapter rated for typical EFI pressures and temperatures, this EVIL ENERGY fitting offers a straightforward solution for repairs, swaps, or custom plumbing without fabricating custom hose ends.\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: Does this fitting work with both 3\/8\" and 5\/16\" fuel lines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the quick-disconnect female accepts either 3\/8\" or 5\/16\" hose IDs, allowing flexible connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this with high-pressure EFI systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It’s rated to 1500 psi, suitable for most EFI setups; verify requirements for extreme racing applications.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"EVIL ENERGY","offers":[{"title":"Default Title","offer_id":55163757691223,"sku":"B0C4SHM6QL","price":32.41,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/evil-energy-front-view-6an-to-quick-disconnect.jpg?v=1790347109","url":"https:\/\/britishgarage.co.uk\/products\/evil-energy-6an-to-3-8in-5-16in-quick-disconnect-fuel-adapter-37-flare-aluminum-1500-psi","provider":"British Garage","version":"1.0","type":"link"}