{"product_id":"evil-energy-6an-to-5-16-quick-disconnect-female-adapter-pair-37-flare-6061-t6-aluminum-1500-psi","title":"EVIL ENERGY 6AN to 5\/16\" Quick-Disconnect Female Adapter Pair — 37° Flare, 6061-T6 Aluminium, 1500 PSI","description":"\u003cp\u003e\u003cstrong\u003eEVIL ENERGY's 6AN male to 5\/16\" quick-disconnect female push-on fitting (2 pieces) converts a 6AN threaded line to a 5\/16\" spring-lock fuel hose with a sealed 37° flare for leak-resistant connections.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis pair of fittings bridges common aftermarket fuel and fluid plumbing standards, letting you join AN-style hard lines or adapters to OEM-style 5\/16\" spring-lock hoses quickly and reliably. Machined from 6061-T6 aluminum with a 37° flare sealing face and plastic spring-retainer, the fittings are built for high-pressure engine and transmission fluid work across a broad temperature range.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this fitting stop leaks on high-pressure lines?\u003c\/h3\u003e\n\n\u003cp\u003eThe fitting uses a 37° flare sealing geometry that mates to the corresponding flare on the 6AN male side to provide a metal-to-metal seal. The female quick-disconnect side features a spring-lock design that snaps onto 5\/16\" hose assemblies for a secondary retention point. Together they minimize leak paths when installed correctly and torqued to proper spec.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e37° flare sealing face prevents seepage at the AN connection.\u003c\/li\u003e\n  \u003cli\u003eSpring-lock female accepts standard 5\/16\" push-on hose fittings.\u003c\/li\u003e\n  \u003cli\u003eMachined aluminum body resists corrosion and maintains flange precision.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat operating conditions can these fittings handle?\u003c\/h3\u003e\n\n\u003cp\u003eThese fittings are rated for working pressures up to 1500 psi and have a usable temperature range from -40°F to 176°F, making them suitable for many fuel, return, and cooler-line applications. The aluminum alloy body keeps strength at elevated temperatures while the plastic spring lock maintains secure retention in typical under-hood conditions.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWorking pressure: up to 1500 psi for fuel and fluid circuits.\u003c\/li\u003e\n  \u003cli\u003eTemperature range: -40°F to 176°F for most automotive environments.\u003c\/li\u003e\n  \u003cli\u003e6061-T6 alloy retains dimensional stability under temperature cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich installations and systems is this adapter used for?\u003c\/h3\u003e\n\n\u003cp\u003eThese adapters are designed for fuel rails, LS-swaps, transmission coolers, return lines, fuel sensors, and similar engine-bay plumbing where converting AN threads to 5\/16\" spring-lock hose is necessary. Their compact shape keeps routing simple in tight engine compartments and helps integrate aftermarket fittings with factory-style hoses.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFuel rails and EFI plumbing for aftermarket conversions.\u003c\/li\u003e\n  \u003cli\u003eReturn lines and fuel sensors that require 5\/16\" quick-disconnect hoses.\u003c\/li\u003e\n  \u003cli\u003eTransmission cooler or fluid lines using a 6AN to 5\/16\" interface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain these fittings for best results?\u003c\/h3\u003e\n\n\u003cp\u003eHand-start the 6AN thread, then tighten evenly to avoid cross-threading and ensure the 37° flare seats squarely. Push the spring-lock side fully onto the 5\/16\" hose until the retainer clicks; inspect for play and test under pressure before first use. Periodic visual inspection for wear, corrosion, and secure retention is recommended, especially after heavy vibration exposure.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eStart threads by hand and torque to manufacturer guidance for AN fittings.\u003c\/li\u003e\n  \u003cli\u003eEnsure spring lock fully engages the 5\/16\" hose with audible click.\u003c\/li\u003e\n  \u003cli\u003eInspect seals and retainer after initial run-in and at service intervals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Professional tuners, engine builders, and experienced DIYers converting or repairing fuel and fluid systems who need a compact, high-pressure adapter to join 6AN male lines with 5\/16\" spring-lock hose. If you work on LS swaps, EFI fuel rails, transmission cooling lines, or retrofit OE hoses to AN fittings, this 2-piece EVIL ENERGY adapter provides a durable, sealed option to simplify plumbing transitions.\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: Is this fitting compatible with all 6AN lines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—it's designed for standard 6AN (9\/16-18 UNF) male threads and mates with typical 6AN fittings using a 37° flare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this on fuel systems under boost or high pressure?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The fitting is rated to 1500 psi and works for most boosted or high-pressure fuel lines when installed correctly.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"EVIL ENERGY","offers":[{"title":"Default Title","offer_id":55161879200087,"sku":"B0BNN8DDLY","price":29.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/evil-energy-front-view-6an-to-5-16-push-on.jpg?v=1790333218","url":"https:\/\/britishgarage.co.uk\/products\/evil-energy-6an-to-5-16-quick-disconnect-female-adapter-pair-37-flare-6061-t6-aluminum-1500-psi","provider":"British Garage","version":"1.0","type":"link"}