{"product_id":"ailbiuko-53pc-brass-dot-air-brake-line-compression-straight-unions-ca360-brass-ptfe-tape","title":"Ailbiuko 53PC Brass DOT Air Brake Line Compression Straight Unions — CA360 Brass, PTFE Tape","description":"\u003cp\u003e\u003cstrong\u003eThis 53-piece Ailbiuko brass DOT straight union kit supplies DOT-compliant compression fittings and ferrules for joining air brake tubing securely.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Ailbiuko 53PCS Brass DOT Air Brake Line Compression Fittings Straight Union is a full assortment designed for repairing and extending air brake lines and other pneumatic copper tubing systems. Built from CA360 brass to meet DOT FMVSS 571.106 standards, the kit includes multiple union sizes, ferrules and a roll of PTFE tape so you can complete most common in-line joins without sourcing extra parts.\u003c\/p\u003e\n\n\u003ch3\u003eWhat sizes and parts are included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains a broad selection of straight union fittings and the matching sleeves needed for compression connections. It covers small to larger brake tube diameters to fit many vehicle and equipment applications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4 × 1\/8\" × 1\/8\" straight unions\u003c\/li\u003e\n  \u003cli\u003e6 × 1\/4\" × 1\/4\" straight unions\u003c\/li\u003e\n  \u003cli\u003e6 × 3\/8\" × 3\/8\" straight unions\u003c\/li\u003e\n  \u003cli\u003e2 × 1\/2\" × 1\/2\" straight unions and 1 × 5\/8\" × 5\/8\" union\u003c\/li\u003e\n  \u003cli\u003e34 ferrule sleeves and 1 roll of PTFE (Teflon) tape included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable are these fittings under operating conditions?\u003c\/h3\u003e\n\u003cp\u003eAilbiuko manufactures these unions from CA360 brass for corrosion resistance and high-temperature performance suited to air brake environments. They withstand a wide working temperature span and are rated for typical pneumatic pressures used in brake systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: CA360 brass, resistant to corrosion and wear\u003c\/li\u003e\n  \u003cli\u003ePressure tolerance: up to approximately 300 PSI under normal conditions\u003c\/li\u003e\n  \u003cli\u003eTemperature range: approximately -65°F to +200°F (follow tubing maker limits)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install the compression straight unions?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: slide the ferrule over the tubing, insert the tube into the union, then tighten the nut to compress the sleeve. Using a wrench in confined spaces will ensure a secure, leak-minimizing connection; the included PTFE tape helps improve seal integrity on threaded joins.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrepare tubing: cut square and deburr before assembly\u003c\/li\u003e\n  \u003cli\u003eFit sleeve then insert tubing fully into the union body\u003c\/li\u003e\n  \u003cli\u003eTighten with appropriate wrenches and add PTFE tape on threaded areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere can I use these straight union fittings?\u003c\/h3\u003e\n\u003cp\u003eThese unions are intended for air systems that use copper or compatible tubing and are commonly applied across automotive and light industrial pneumatic tasks. They are suitable for repair, replacement or custom plumbing of brake and air-operated components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive and truck air brake line repairs and extensions\u003c\/li\u003e\n  \u003cli\u003eAir horns, gauges, and seat-operating air systems\u003c\/li\u003e\n  \u003cli\u003eWorkshop pneumatic lines, towing equipment, and lawn mower air controls\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Technicians, DIY mechanics, fleet maintenance crews and hobbyists who need a comprehensive set of DOT-compatible straight union compression fittings will find this Ailbiuko kit useful. It saves time sourcing multiple sizes by bundling commonly used unions, ferrules and sealing tape, making on-vehicle repairs and shop plumbing faster and more reliable. Always verify tubing compatibility and follow vehicle manufacturer specifications when servicing air brake systems.\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 fittings DOT compliant?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the fittings are made from CA360 brass and meet DOT FMVSS 571.106 requirements for air brake applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this kit on non-copper tubes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: These compression unions are intended for copper or compatible tubing. Check tube manufacturer specs for compatibility before use.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Ailbiuko","offers":[{"title":"Default Title","offer_id":48086776742046,"sku":"B0D5CJ7TX3","price":57.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ailbiuko-front-kit-layout_b6bacd20-a0ad-4398-a2e2-989bcb8d41aa.jpg?v=1785904670","url":"https:\/\/northtrailauto.ca\/products\/ailbiuko-53pc-brass-dot-air-brake-line-compression-straight-unions-ca360-brass-ptfe-tape","provider":"North Trail Auto","version":"1.0","type":"link"}