{"product_id":"proto-j3764-open-end-flare-nut-wrench-3-8-x-7-16-in","title":"Proto J3764 Open End Flare Nut Wrench 3\/8 X 7\/16 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PROTO J3764 is a double-end open end flare nut wrench designed for gripping flare fittings on refrigerant lines, fuel lines, and hydraulic connections without rounding the nut. The wrench spans 3\/8 inch and 7\/16 inch openings, providing two of the most commonly needed sizes in a single tool. Constructed from steel with a chrome finish, it measures 6.25 inches overall length and weighs 0.17 pounds. The 6-point jaw contact pattern distributes force evenly across the nut flats, reducing the risk of damage to soft fittings during service. HVAC technicians, plumbers, and automotive technicians reach for this style of wrench when working on flared tube connections where a standard open end wrench would slip.\u003c\/p\u003e\u003cp\u003eThis wrench is suited for residential and light commercial HVAC service involving flare fittings on copper refrigerant lines, as well as plumbing applications with compression-style flare connections. The double-end design makes it practical in tight spaces where repositioning tools is inconvenient. It is appropriate for use on brass and steel flare nuts in sizes 3\/8 inch and 7\/16 inch across flat, common in both refrigeration and fuel line work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDouble-end head with 3\/8 inch and 7\/16 inch openings in one tool\u003c\/li\u003e\n\u003cli\u003e6-point jaw contact reduces rounding on flare nuts\u003c\/li\u003e\n\u003cli\u003eChrome finish over steel construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e6.25 inches overall length fits into standard tool pouches\u003c\/li\u003e\n\u003cli\u003eLightweight at 0.17 pounds for reduced hand fatigue during overhead work\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style service wrench for flare nut applications requiring 3\/8 inch or 7\/16 inch across-flat sizing, typical in residential HVAC refrigerant piping, fuel line, and hydraulic fitting service.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eLicensed HVAC technicians and plumbers typically use flare nut wrenches during refrigerant line connection and fuel line service. Always depressurize the line and recover refrigerant per EPA Section 608 regulations before loosening flare fittings on refrigerant circuits. Position the wrench fully seated on the nut flats before applying torque to avoid slippage. Do not use extension bars or pipe cheaters on this wrench, as overloading the jaw can damage soft brass fittings.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWrench Type\u003c\/strong\u003e: Open End Flare Nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Configuration\u003c\/strong\u003e: Double End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening Sizes\u003c\/strong\u003e: 3\/8 inches and 7\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoints\u003c\/strong\u003e: 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27110000\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PROTO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: J3764\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROTO","offers":[{"title":"Default Title","offer_id":51540999536946,"sku":"J3764","price":42.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/057b21cb504e7eea21ba880ab4ecbd85.jpg?v=1785867169","url":"https:\/\/voomisupply.com\/products\/proto-j3764-open-end-flare-nut-wrench-3-8-x-7-16-in","provider":"Voomi Supply","version":"1.0","type":"link"}