{"product_id":"klein-tools-640-5-16-hollow-shaft-nut-driver-5-16-in","title":"Klein Tools 640-5\/16 Hollow Shaft Nut Driver 5\/16 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KLEIN TOOLS 640-5\/16 is a hollow shaft nut driver designed for fastening and loosening hex nuts in HVAC, electrical, and general trade applications. The hollow shaft design allows the driver to seat fully over long threaded studs and bolt shafts that extend beyond the nut face, making it a practical choice where standard closed-shaft drivers cannot complete the job. The 5\/16 inch hex drive pairs with a heat-treated, tempered chrome-plated steel shank for durability under repeated torque loads. The yellow cushion-grip handle provides hand comfort during extended use. Licensed electricians, HVAC technicians, and plumbers routinely carry this driver as a standard hand tool on service calls.\u003c\/p\u003e\n\u003cp\u003eThis nut driver is suited for residential and light commercial service work where 5\/16 inch hex fasteners appear frequently — including electrical panel work, equipment mounting, duct hardware, and control board brackets. The 3 inch shank length gives adequate reach into recessed fastener locations without sacrificing control. The plastic-dipped shank helps resist corrosion in wet or chemically exposed environments. It is sold individually and is also available in a pack of six for shop or van stocking.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHollow shaft accepts long threaded studs and bolts extending past the nut face\u003c\/li\u003e\n  \u003cli\u003e5\/16 inch hex drive size for standard trade fasteners\u003c\/li\u003e\n  \u003cli\u003e3 inch shank length for reach into recessed hardware\u003c\/li\u003e\n  \u003cli\u003eHeat-treated, tempered chrome-plated steel shank for durability\u003c\/li\u003e\n  \u003cli\u003eYellow cushion-grip handle reduces hand fatigue during repetitive use\u003c\/li\u003e\n  \u003cli\u003ePlastic-dipped shank for added corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard 5\/16 inch hex nuts and fasteners commonly found in HVAC equipment, electrical panels, and plumbing fixture hardware.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eAlways de-energize electrical equipment before working on fasteners near live circuits. This tool is a hand driver and is not rated for use with power-drive adapters. Inspect the shank and handle for cracks or damage before each use. Consult applicable NEC or local code requirements when servicing energized enclosures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 5\/16 inch hex\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft Type\u003c\/strong\u003e: Hollow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Material\u003c\/strong\u003e: Heat-treated tempered chrome-plated steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandle Material\u003c\/strong\u003e: Plastic cushion grip\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandle Color\u003c\/strong\u003e: Yellow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 pounds\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: KLEIN TOOLS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 640-5\/16\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KLEIN TOOLS","offers":[{"title":"Default Title","offer_id":51346249744690,"sku":"640-5\/16","price":111.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310503209.jpg?v=1782075159","url":"https:\/\/voomisupply.com\/products\/klein-tools-640-5-16-hollow-shaft-nut-driver-5-16-in","provider":"Voomi Supply","version":"1.0","type":"link"}