{"product_id":"evil-energy-6an-male-to-3-8-5-16-hardline-compression","title":"EVIL ENERGY 6AN Male to 3\/8\" \u0026 5\/16\" Hardline Compression","description":"\u003cstrong\u003eCompact aluminum 6AN male to 3\/8\" and 5\/16\" hardline compression adapter for secure fuel and fluid line transitions.\u003c\/strong\u003e\n\n\u003cp\u003eThis EVIL ENERGY adapter converts a 6AN male flare (9\/16-18 UNF) to accept 3\/8\" and 5\/16\" hardline using a compression ferrule system. Machined from aluminum alloy with a brass ferrule and a 37° flared sealing face, it’s built to join stainless steel or aluminum rigid lines in automotive fuel delivery, engine plumbing, and performance modifications. Double-check tube diameters before installation to ensure a proper fit.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this adapter connect a 6AN system to hardline tubing?\u003c\/h3\u003e\n\u003cp\u003eThe adapter uses a 37° flared AN male thread to mate with a female 6AN fitting while compressing a brass ferrule around the hardline tube for a leak-resistant seal. Installation requires inserting the pre-cut hardline into the ferrule and tightening the body to the specified torque for a secure joint.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread: 6AN male 9\/16-18 UNF for AN compatibility\u003c\/li\u003e\n  \u003cli\u003eHardline sizes accepted: 3\/8\" and 5\/16\"\u003c\/li\u003e\n  \u003cli\u003eSealing method: 37° flare face plus compression ferrule\u003c\/li\u003e\n  \u003cli\u003eMaterials: aluminum alloy body and brass ferrule for corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this adapter work with my hardline and fuel system?\u003c\/h3\u003e\n\u003cp\u003eIt is intended specifically for rigid tubing made of stainless steel or aluminum; it is not designed for soft rubber hose or nylon lines. The adapter is suitable for fuel delivery, return lines, and other engine plumbing where a durable metal-to-metal connection is required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible tubing: stainless steel or aluminum rigid hardline\u003c\/li\u003e\n  \u003cli\u003eTypical applications: fuel lines, engine modifications, custom plumbing\u003c\/li\u003e\n  \u003cli\u003eNot recommended for soft hoses or non-metallic tubing\u003c\/li\u003e\n  \u003cli\u003eMeasure tube OD to confirm 3\/8\" or 5\/16\" fit before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the materials and how do they affect durability?\u003c\/h3\u003e\n\u003cp\u003eThe adapter body is CNC-machined from aluminum alloy for light weight and corrosion resistance, while the ferrule is brass to provide a tough, conforming seal around the hardline. Together they balance strength, sealing reliability, and resistance to fuel-compatible corrosion in automotive environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBody: aluminum alloy — lightweight and corrosion-resistant\u003c\/li\u003e\n  \u003cli\u003eFerrule: brass — malleable for tight compression sealing\u003c\/li\u003e\n  \u003cli\u003eSealing face: 37° flare for standardized AN connectivity\u003c\/li\u003e\n  \u003cli\u003eRecommended use: fuel and fluid systems compatible with metal components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I prepare and install the fitting for best results?\u003c\/h3\u003e\n\u003cp\u003eCut the hardline square, deburr the ID and OD, and slide the brass ferrule onto the tube before inserting it fully into the adapter. Tighten to recommended specs and test for leaks under pressure before returning the vehicle to service.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCut lines cleanly and deburr to avoid sealing issues\u003c\/li\u003e\n  \u003cli\u003eSlide ferrule on, insert tube, then torque to spec\u003c\/li\u003e\n  \u003cli\u003ePressure-check the assembly before regular operation\u003c\/li\u003e\n  \u003cli\u003eOnly install on stainless steel or aluminum hardline\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: This EVIL ENERGY adapter suits mechanics, fabricators, and performance enthusiasts building or repairing metal fuel and fluid systems who need a compact, reliable transition from 6AN flare fittings to 3\/8\" or 5\/16\" rigid hardline. Choose this part when you require a lightweight, machined aluminum connector with a brass ferrule for dependable metal-to-metal seals in automotive or motorsport plumbing projects.\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: Can I use this adapter with soft fuel hose?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — it is designed for stainless steel or aluminum hardline only, not for soft rubber or nylon hoses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What thread size is the 6AN connection?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 6AN male thread is 9\/16-18 UNF and seals on a 37° flare face.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"EVIL ENERGY","offers":[{"title":"Default Title","offer_id":48087282385054,"sku":"B0FN3S9ZYJ","price":37.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/evil-energy-front-view-adapter_b64afc91-f37e-4a38-a132-9af16a0c44fa.jpg?v=1785920209","url":"https:\/\/northtrailauto.ca\/products\/evil-energy-6an-male-to-3-8-5-16-hardline-compression","provider":"North Trail Auto","version":"1.0","type":"link"}