{"product_id":"taiidaues-6an-flare-cap-block-off-fittings-6-pcs-black-aluminum-hex-adapters-6061-t6-37-seal","title":"Taiidaues 6AN Flare Cap Block-Off Fittings, 6 Pcs Black Aluminum Hex Adapters 6061‑T6 37° Seal","description":"\u003cp\u003e\u003cstrong\u003eThese Taiidaues 6AN flare cap block-off fittings are aluminum 6AN female hex adapters designed to securely seal AN flare lines and block off unused ports in fuel, oil, and hydraulic systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003ePrecision-machined from 6061-T6 aluminum, this six-piece set delivers lightweight strength and corrosion resistance for automotive, racing, and industrial plumbing tasks. Each cap features a 37° conical sealing surface and 9\/16\"-18 UNF AN threading to match standard 6AN flare male fittings, creating a tight, high-pressure seal. The black anodized finish protects the surface while providing a professional appearance on engine bays, fuel systems, and custom hose assemblies.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these caps create a leak-resistant connection?\u003c\/h3\u003e\n\u003cp\u003eThe design uses a 37° conical sealing face that mates precisely with AN male flare fittings, forming a metal-to-metal seal. Combined with accurate 9\/16\"-18 UNF threading, the caps clamp down evenly, minimizing gaps where fluid or vapor could escape.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e37° conical sealing surface compatible with 6AN flare fittings\u003c\/li\u003e\n  \u003cli\u003ePrecision 9\/16\"-18 UNF AN thread for proper engagement\u003c\/li\u003e\n  \u003cli\u003eHex adapter shape allows even torque application for consistent seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat operating conditions and pressures can these adapters handle?\u003c\/h3\u003e\n\u003cp\u003eManufactured from 6061-T6 aluminum and anodized for surface protection, the caps tolerate a wide temperature range and resist corrosion in demanding environments. They are rated for working pressures up to about 1500 psi under typical conditions, making them suitable for many fuel and low- to mid-pressure hydraulic applications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorking pressure rating around 1500 psi for standard use\u003c\/li\u003e\n  \u003cli\u003eTemperature range roughly -65°F to 252°F (-54°C to 122°C)\u003c\/li\u003e\n  \u003cli\u003e6061-T6 alloy offers high strength with reduced weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich systems and applications are these 6AN caps best suited for?\u003c\/h3\u003e\n\u003cp\u003eThese block-off fittings are intended to close unused AN ports or temporarily cap lines during maintenance and assembly. They are commonly used in returnless fuel systems, fuel cells, fuel lines, valve covers, and other automotive or custom plumbing setups where contamination prevention and secure shutdowns are required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReturnless fuel systems and fuel cell installations\u003c\/li\u003e\n  \u003cli\u003eFuel, oil, and low- to mid-pressure hydraulic lines\u003c\/li\u003e\n  \u003cli\u003eService or assembly uses: block-offs, test caps, and temporary seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and remove these flare cap adapters safely?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: hand-start the cap onto the male AN flare, then tighten with a wrench on the hex to achieve a snug metal-to-metal seal. For removal, loosen the hex with a wrench and back the cap off by hand; always depressurize the line and follow safety procedures before working on fluid systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHand-thread first to avoid cross-threading\u003c\/li\u003e\n  \u003cli\u003eUse a wrench on the hex for final tightening — avoid over-torquing\u003c\/li\u003e\n  \u003cli\u003eAlways depressurize and drain lines before removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: mechanics, fabricators, and DIY enthusiasts who need reliable 6AN caps for blocking or sealing AN flare fittings will find these Taiidaues adapters practical and cost-effective. The six-piece pack suits small projects, shop spares, or vehicle maintenance tasks where consistent sealing, corrosion resistance, and lightweight performance matter.\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 caps compatible with standard 6AN male flare fittings?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They use 9\/16\"-18 UNF threads and a 37° seat to mate with standard 6AN male flare fittings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use these caps on fuel systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They are commonly used on fuel lines and fuel cells but always follow fuel-system safety and pressure guidelines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Taiidaues","offers":[{"title":"Default Title","offer_id":48086864035998,"sku":"B0F9Y5F5L1","price":30.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/taiidaues-front-view-packaging.jpg?v=1785908521","url":"https:\/\/northtrailauto.ca\/products\/taiidaues-6an-flare-cap-block-off-fittings-6-pcs-black-aluminum-hex-adapters-6061-t6-37-seal","provider":"North Trail Auto","version":"1.0","type":"link"}