Klein Tools 646-5/16M Magnetic Nut Driver 5/16 in

Product Description

The KLEIN TOOLS 646-5/16M is a magnetic tip nut driver built for electricians and other trade professionals who need a reliable, one-handed fastening tool. The 5/16-inch drive size handles some of the most common fastener sizes found in electrical panels, junction boxes, and conduit fittings. The hollow shaft design allows the driver to seat fully on long-shank bolts and threaded rod without bottoming out, and the magnetic tip retains the nut during placement so technicians can work in tight or overhead spaces without losing hardware.

This nut driver is suited for residential and commercial electrical work, including panel installation, device rough-in, and general fastening tasks where speed and control matter. The hollow shaft makes it practical for conduit locknuts and long machine screws that extend past the fastener face. It is sold individually but is also available in a six-piece pack configuration for stocking tool bags or service vehicles.

Key Features

• 5/16-inch drive size covers common electrical and HVAC fastener heads
• Magnetic tip retains nuts during placement in confined or overhead locations
• Hollow shaft accommodates fasteners with extended thread length
• 6-inch overall length provides reach into recessed cavities and enclosures
• Sold individually; also packaged in quantities of six

Compatibility

Designed as an OEM-style hand tool for use with standard 5/16-inch hex nuts and fasteners commonly found in electrical, HVAC, and light mechanical applications.

Installation Notes

This tool is installed by hand and requires no power source or special setup. De-energize any electrical panel or equipment before working in the vicinity of live conductors, in accordance with NFPA 70E lockout/tagout requirements. Inspect the magnetic tip periodically to ensure it has not collected metal debris that could cause a short or bridging hazard near live terminals.

Technical Specifications

• Drive Size: 5/16 inches
• Shaft Length: 6 inches
• Shaft Type: Hollow
• Tip Type: Magnetic
• Unit of Measure: Each
• Minimum Order Quantity: 6

Standard Information

• Brand: KLEIN TOOLS
• Manufacturer Part Number: 646-5/16M