{"product_id":"proto-j49000-20-piece-3-8-drive-crowfoot-wrench-set","title":"Proto J49000 20 Piece 3\/8 Drive Crowfoot Wrench Set","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PROTO J49000 is a 20-piece, 3\/8 inch drive open end crowfoot wrench set designed for professional tradespeople who need reliable torque wrench access in confined or obstructed spaces. The set spans both fractional and metric sizes, covering 3\/8 through 7\/8 inch in fractional increments and 10 through 19 millimeters in metric. Built to ASME B107.21 standards, these crowfoot wrenches attach directly to a 3\/8 inch drive torque wrench or extension, allowing technicians to apply measured torque to fasteners that are inaccessible to standard sockets. The set weighs 2.48 pounds, making it a practical addition to any service truck or shop toolbox.\u003c\/p\u003e\n\u003cp\u003eCrowfoot wrenches are a standard tool for HVAC technicians, plumbers, automotive technicians, and industrial maintenance professionals. They are commonly used when tightening or loosening flare fittings, fuel line fittings, hydraulic line connections, and other fasteners where a socket cannot seat fully due to line interference or tight clearances. The J49000 covers the most frequently encountered fractional and metric sizes in a single set, reducing the need for individual crowfoot purchases across common fastener ranges.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e20-piece set includes both fractional (3\/8 through 7\/8 inch) and metric (10 through 19 mm) open end crowfoot wrenches\u003c\/li\u003e\n  \u003cli\u003e3\/8 inch drive fits standard torque wrenches, ratchets, and drive extensions\u003c\/li\u003e\n  \u003cli\u003eMeets ASME B107.21 standards for hand torque tools\u003c\/li\u003e\n  \u003cli\u003eOpen end crowfoot design provides access to line fittings and fasteners in restricted spaces\u003c\/li\u003e\n  \u003cli\u003eCompact set weight of 2.48 pounds for practical portability on the job\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with any standard 3\/8 inch drive torque wrench, ratchet, or drive extension. Compatible with fasteners requiring fractional sizes 3\/8 through 7\/8 inch and metric sizes 10 through 19 mm.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eAlways ensure the crowfoot wrench is fully seated on the drive tool before applying torque. When using crowfoot wrenches with a torque wrench at an angle other than 90 degrees, apply the appropriate correction factor per the torque wrench manufacturer guidelines to maintain accurate torque output. Power down or depressurize the system being serviced before loosening fittings to prevent fluid or gas release. These wrenches are intended for hand torque applications only and should not be used with impact drivers.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 3\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFractional Sizes\u003c\/strong\u003e: 3\/8, 7\/16, 1\/2, 9\/16, 5\/8, 11\/16, 3\/4, 13\/16, 7\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMetric Sizes\u003c\/strong\u003e: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSet Type\u003c\/strong\u003e: Open End Crowfoot Wrench Set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ASME B107.21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 6.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 4.7 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.48 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27110000\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: J49000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROTO","offers":[{"title":"Default Title","offer_id":51540216250674,"sku":"J49000","price":688.29,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/88602189926227266128ddbb178a1211.jpg?v=1785849155","url":"https:\/\/voomisupply.com\/products\/proto-j49000-20-piece-3-8-drive-crowfoot-wrench-set","provider":"Voomi Supply","version":"1.0","type":"link"}