{"product_id":"brass-compression-union-straight-coupling-fitting-4-16mm","title":"Brass Compression Union Straight Coupling 4–16mm Fitting","description":"\n\u003ch2\u003eBrass Compression Union Straight Coupling – Multi-Size Fitting for Tubing \u0026amp; Pipe Systems\u003c\/h2\u003e\n\u003cp\u003eUpgrade your plumbing, instrumentation, hydraulic, or pneumatic setup with this heavy-duty \u003cstrong\u003eBrass Compression Union Straight Coupling\u003c\/strong\u003e. Available in a wide range of sizes — 4, 5, 6, 8, 10, 12, and 16 mm as well as 1\/8\", 3\/16\", 1\/4\", 5\/16\", 3\/8\", and 1\/2\" — this versatile adapter is built for reliable, leak-free connections across a variety of tubing types.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex head on both sides\u003c\/strong\u003e for excellent grip and easy installation with standard wrenches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-duty brass construction\u003c\/strong\u003e — rust-proof, corrosion-resistant, high-temperature ductile, and low magnetic permeability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep, high-quality threads\u003c\/strong\u003e that bite firmly for a secure, leak-free compression seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree-piece design\u003c\/strong\u003e: nut, sleeve, and body with attached insert — simple assembly and reliable performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal compatibility\u003c\/strong\u003e: works with copper, brass, aluminum, and plastic tubing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide size range\u003c\/strong\u003e: 4–16 mm metric and 1\/8\"–1\/2\" imperial sizes available to suit your exact requirements\u003c\/li\u003e\n  \u003cli\u003eMaximum operating pressure: \u0026lt;850 kPa\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBrass (Copper Alloy)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGold\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCompression Union \/ Straight Coupling\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes Available\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4, 5, 6, 8, 10, 12, 16 mm \/ 1\/8\", 3\/16\", 1\/4\", 5\/16\", 3\/8\", 1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;850 kPa\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInstrumentation, hydraulic \u0026amp; pneumatic systems, plumbing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cp\u003e1 × Brass Compression Union Straight Coupling (size of your choice)\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-2-pin-quick-splice-spring-wire-connectors-lock-terminals\"\u003e10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed\"\u003e10\/20mm Diamond Flat Grinding Wheel – Heavy Duty Concrete Grinder\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What types of tubing are compatible with this brass compression fitting?\u003c\/h4\u003e\n\u003cp\u003eA: This brass compression union straight coupling is compatible with copper, brass, aluminum, and plastic tubing. Its deep-threaded, three-piece construction ensures a secure grip on all these materials for a leak-free connection.\u003c\/p\u003e\n\u003ch4\u003eQ: What sizes does this compression fitting come in?\u003c\/h4\u003e\n\u003cp\u003eA: The fitting is available in both metric and imperial sizes: 4, 5, 6, 8, 10, 12, and 16 mm, as well as 1\/8\", 3\/16\", 1\/4\", 5\/16\", 3\/8\", and 1\/2\". Choose the size that matches your tubing's outer diameter.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the maximum pressure rating for this brass compression coupling?\u003c\/h4\u003e\n\u003cp\u003eA: This compression union straight coupling is rated for pressures under 850 kPa, making it suitable for instrumentation, hydraulic, and pneumatic systems operating within that range.\u003c\/p\u003e\n\u003ch4\u003eQ: Is any special tool required to install this fitting?\u003c\/h4\u003e\n\u003cp\u003eA: No special tools are needed. The hex head on both sides of the fitting allows you to tighten and secure it using a standard wrench, making installation straightforward for DIY and professional applications alike.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What types of tubing are compatible with this brass compression fitting?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This brass compression union straight coupling is compatible with copper, brass, aluminum, and plastic tubing. Its deep-threaded, three-piece construction ensures a secure grip on all these materials for a leak-free connection.\"}}, {\"@type\": \"Question\", \"name\": \"What sizes does this compression fitting come in?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The fitting is available in both metric and imperial sizes: 4, 5, 6, 8, 10, 12, and 16 mm, as well as 1\/8\\\", 3\/16\\\", 1\/4\\\", 5\/16\\\", 3\/8\\\", and 1\/2\\\". 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The hex head on both sides of the fitting allows you to tighten and secure it using a standard wrench, making installation straightforward for DIY and professional applications alike.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Brass Compression Union Straight Coupling 4–16mm Fitting\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/products\/brass-compression-union-straight-coupling-fitting-4-16mm\"}]}\u003c\/script\u003e","brand":"Richie's","offers":[{"title":"8mm","offer_id":57599661015206,"sku":"1005012849649937-8mm","price":15.64,"currency_code":"USD","in_stock":true},{"title":"6mm","offer_id":57599661047974,"sku":"1005012849649937-6mm","price":13.73,"currency_code":"USD","in_stock":true},{"title":"5mm","offer_id":57599661080742,"sku":"1005012849649937-5mm","price":11.45,"currency_code":"USD","in_stock":true},{"title":"4mm","offer_id":57599661113510,"sku":"1005012849649937-4mm","price":10.49,"currency_code":"USD","in_stock":true},{"title":"4mm To 6mm","offer_id":57599661146278,"sku":"1005012849649937-4mm To 6mm","price":11.33,"currency_code":"USD","in_stock":true},{"title":"16mm","offer_id":57599661179046,"sku":"1005012849649937-16mm","price":26.81,"currency_code":"USD","in_stock":true},{"title":"12mm","offer_id":57599661211814,"sku":"1005012849649937-12mm","price":20.63,"currency_code":"USD","in_stock":true},{"title":"10mm","offer_id":57599661244582,"sku":"1005012849649937-10mm","price":17.76,"currency_code":"USD","in_stock":true},{"title":"10mm To 12mm","offer_id":57599661277350,"sku":"1005012849649937-10mm To 12mm","price":20.75,"currency_code":"USD","in_stock":true},{"title":"8mm To 10mm","offer_id":57599661310118,"sku":"1005012849649937-8mm To 10mm","price":17.4,"currency_code":"USD","in_stock":true},{"title":"6mm To 8mm","offer_id":57599661342886,"sku":"1005012849649937-6mm To 8mm","price":15.08,"currency_code":"USD","in_stock":true},{"title":"5mm To 6mm","offer_id":57599661375654,"sku":"1005012849649937-5mm To 6mm","price":12.05,"currency_code":"USD","in_stock":true},{"title":"5-16-","offer_id":57599661408422,"sku":"1005012849649937-5-16-","price":13.53,"currency_code":"USD","in_stock":true},{"title":"3-16-","offer_id":57599661441190,"sku":"1005012849649937-3-16-","price":11.49,"currency_code":"USD","in_stock":true},{"title":"1-8-","offer_id":57599661473958,"sku":"1005012849649937-1-8-","price":10.41,"currency_code":"USD","in_stock":true},{"title":"8mm To 12mm","offer_id":57599661506726,"sku":"1005012849649937-8mm To 12mm","price":20.79,"currency_code":"USD","in_stock":true},{"title":"5-8-","offer_id":57599661539494,"sku":"1005012849649937-5-8-","price":19.07,"currency_code":"USD","in_stock":true},{"title":"1-2-","offer_id":57599661572262,"sku":"1005012849649937-1-2-","price":16.04,"currency_code":"USD","in_stock":true},{"title":"3-8-","offer_id":57599661605030,"sku":"1005012849649937-3-8-","price":12.53,"currency_code":"USD","in_stock":true},{"title":"1-4-","offer_id":57599661637798,"sku":"1005012849649937-1-4-","price":10.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/2182\/7494\/files\/S080d83a6c6bb459f9c5c427a7e5e71d2y.webp?v=1791667088","url":"https:\/\/richiesmart.com\/products\/brass-compression-union-straight-coupling-fitting-4-16mm","provider":"Richie's","version":"1.0","type":"link"}