Klein Tools 646-5/8 Nut Driver 5/8 Inch Hollow Shaft

Product Description

The KLEIN TOOLS 646-5/8 is a 5/8 inch hollow-shaft nut driver built for electricians, HVAC technicians, and general trade use. The hollow shaft design allows the driver to seat over long bolts and threaded rod without bottoming out, a critical advantage when working in panel boxes, equipment cabinets, and conduit fittings. The shaft measures 6 inches in length with an overall length of 11-3/8 inches. The chrome-plated shaft resists corrosion and is easy to wipe clean on the job. This driver meets ANSI and ASME standards and carries a lifetime warranty from the manufacturer.

The 646-5/8 is suited for residential and commercial electrical work, HVAC service, and any trade application requiring a 5/8 inch nut driver with extended reach. The hollow shaft is particularly useful when driving nuts onto long machine screws or anchor bolts where a closed-end driver would bind. The color-coded handle allows quick identification in a tool pouch or bucket alongside other Klein nut drivers in the same series. It is not insulated and is not intended for live-voltage work.

Key Features

• 5/8 inch hollow shaft seats over long bolts and threaded rod
• 6 inch shaft length with 11-3/8 inch overall length for extended reach
• Chrome-plated shaft for corrosion resistance and easy cleaning
• Color-coded handle for fast size identification in a tool pouch
• Meets ANSI and ASME standards
• Lifetime warranty from manufacturer

Compatibility

Designed for use with standard 5/8 inch hex nuts and bolts across residential and commercial electrical, HVAC, and mechanical trade applications.

Installation Notes

This nut driver is not insulated and must not be used on or near energized conductors or live circuits. De-energize and lock out equipment before servicing any electrical or HVAC assembly. The hollow shaft allows seating over long threaded fasteners, but avoid applying lateral force that could damage the shaft or fastener. This tool is intended for manual use only and is not rated for power-drive applications.