{"product_id":"proto-jn0404rms-hollow-shaft-nut-driver-4-mm","title":"Proto JN0404RMS Hollow Shaft Nut Driver 4 Mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PROTO JN0404RMS is a hollow shaft nut driver designed for driving hex nuts and fasteners in tight or deep-reach applications. The hollow shaft design allows the tool to slide over threaded rod or stud ends, making it especially useful where standard closed-end drivers cannot seat. The ergonomic handle promotes a secure, comfortable grip during extended use. With an overall length of 8.25 inches and a blade length of 4 inches, this driver delivers the reach needed for recessed fastener work. It meets ANSI specification B107.12. HVAC technicians, electricians, and plumbers use this type of driver regularly during panel work, equipment installation, and service calls.\u003c\/p\u003e\u003cp\u003eThe JN0404RMS is suited for residential and light commercial service work where 4 mm hex fasteners are common. Typical applications include HVAC equipment assembly, electrical panel and control box work, and plumbing fixture installation. The hollow shaft is particularly useful when a fastener sits on a protruding threaded rod, allowing full seating without interference. Packaged individually, this driver ships in a pouch for field or van storage.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHollow shaft allows use over threaded rod or protruding studs\u003c\/li\u003e\n\u003cli\u003e4 mm drive size for metric hex fasteners\u003c\/li\u003e\n\u003cli\u003e8.25-inch overall length with 4-inch blade for extended reach\u003c\/li\u003e\n\u003cli\u003eErgonomic handle provides grip comfort during sustained torque\u003c\/li\u003e\n\u003cli\u003eMeets ANSI B107.12 specification\u003c\/li\u003e\n\u003cli\u003eLifetime warranty from PROTO\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with 4 mm hex nuts and fasteners in standard metric applications across HVAC, electrical, and plumbing service work.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is used by licensed HVAC technicians, electricians, and plumbers during equipment installation and maintenance. Always de-energize electrical equipment and shut off relevant systems before accessing fasteners inside panels or control boxes. Use the correct drive size to avoid rounding fastener heads. Inspect the driver for wear or damage before each use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 4 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Type\u003c\/strong\u003e: Hollow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 8.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Type\u003c\/strong\u003e: Ergonomic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 7.35 x 7.35 x 1.15 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContainer Type\u003c\/strong\u003e: Pouch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Specification\u003c\/strong\u003e: B107.12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27111702\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: Lifetime\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: JN0404RMS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROTO","offers":[{"title":"Default Title","offer_id":51538335498546,"sku":"JN0404RMS","price":31.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/df34589225c63d796b615678b963f2f4.jpg?v=1785823163","url":"https:\/\/voomisupply.com\/products\/proto-jn0404rms-hollow-shaft-nut-driver-4-mm","provider":"Voomi Supply","version":"1.0","type":"link"}