{"product_id":"cerrobrass-nsr4-86-brass-flared-refrigeration-nut","title":"Cerrobrass NSR4-86 Brass Flared Refrigeration Nut","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CERROBRASS NSR4-86 is a brass flared tube refrigeration nut designed to secure 45-degree flare connections on refrigerant-carrying tubing. It mates with flared copper tubing at compression ends, creating a leak-resistant mechanical joint without soldering. The nut is machined from brass for corrosion resistance and dimensional stability in refrigeration and air conditioning line sets. Tube OD compatibility is 1\/2 inch by 3\/8 inch. HVAC technicians and refrigeration mechanics use this fitting when assembling or servicing flare connections on refrigerant lines, service valves, and related components.\u003c\/p\u003e\u003cp\u003eThis refrigeration nut is suited for residential and light commercial HVAC and refrigeration systems where 45-degree flare fittings are specified. It is commonly installed at service valve connections, refrigerant line terminations, and anywhere a removable, pressure-rated flare joint is required. The compression-end design makes it a standard choice for field installations and service calls involving copper refrigerant tubing.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBrass construction for corrosion resistance and long service life in refrigeration environments\u003c\/li\u003e\n\u003cli\u003e45-degree flare angle matches standard refrigeration and HVAC flare tooling\u003c\/li\u003e\n\u003cli\u003eTube OD sizing: 1\/2 inch by 3\/8 inch for direct compatibility with common refrigerant line diameters\u003c\/li\u003e\n\u003cli\u003eCompression end connection  -  no soldering or brazing required at the nut interface\u003c\/li\u003e\n\u003cli\u003eCompact, single-piece design for straightforward field installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and service fitting for residential and light commercial HVAC and refrigeration systems using 45-degree flared copper tubing connections at 1\/2 inch by 3\/8 inch tube OD.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by licensed HVAC technicians or refrigeration mechanics. Recover all refrigerant and depressurize the system before disassembling any flare connections. Use a calibrated flare tool to produce a clean, even 45-degree flare on the copper tubing before threading the nut. Overtightening can crack the flare or distort the seat  -  tighten to hand-snug and then follow standard trade practice for final torque without exceeding the fitting's design limits.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Refrigeration Nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlared Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Connection\u003c\/strong\u003e: Compression\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Outside Diameter\u003c\/strong\u003e: 1\/2 x 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27121707\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: CERROBRASS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: NSR4-86\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CERROBRASS","offers":[{"title":"Default Title","offer_id":67912490582322,"sku":"NSR4-86","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bbe23e4bba1bb49ec5b9395d4a85dd5f.jpg?v=1791235240","url":"https:\/\/voomisupply.com\/products\/cerrobrass-nsr4-86-brass-flared-refrigeration-nut","provider":"Voomi Supply","version":"1.0","type":"link"}