Klein Tools 646-7/16 Hollow-shank Nut Driver 7/16 in

Product Description

The KLEIN TOOLS 646-7/16 is a hollow-shank nut driver built for trade professionals who need to drive nuts and bolts in tight spaces or over long threaded rod. The hollow shank allows the driver to pass fully over extended fasteners, which is a common requirement in electrical panel work, conduit installation, and equipment assembly. The 7/16 inch drive size and 6 inch shank length make this a go-to tool for reaching recessed fasteners without an adapter. The cushion-grip handle reduces hand fatigue during repetitive use and provides a secure grip in both wet and dry conditions.

This nut driver is suited for residential and commercial electrical work, HVAC equipment installation, and general mechanical assembly. Electricians and HVAC technicians reach for hollow-shank drivers when working with machine screws and hex-head fasteners on panel boards, disconnect boxes, and equipment enclosures. The 6 inch shank provides extra reach into deep cabinets and tight service areas where a standard-length driver cannot seat properly.

Key Features

• Hollow shank design allows full pass-through over threaded rod and long fastener shanks
• 7/16 inch drive size fits common hex-head fasteners in electrical and HVAC applications
• 6 inch shank length provides extended reach into recessed or deep fastener locations
• Cushion-grip handle reduces hand fatigue and improves torque control during extended use
• Lightweight at 0.35 pounds for all-day carry in a tool pouch or bag

Compatibility

Designed as a hand tool for driving 7/16 inch hex-head nuts and bolts in electrical, HVAC, and mechanical assembly applications.

Installation Notes

This tool requires no installation and is ready for use out of the package. De-energize all circuits and follow NFPA 70E arc flash safety procedures before using any hand tool inside live electrical enclosures. Inspect the handle and shank for cracks or damage before each use, and do not apply additional leverage with a wrench or extension bar to the handle.

Technical Specifications

• Drive Size: 7/16 inches
• Shank Length: 6 inches
• Shank Type: Hollow
• Handle Type: Cushion-Grip
• Weight: 0.35 pounds
• Sold As: Each

Standard Information

• Brand: KLEIN TOOLS
• Manufacturer Part Number: 646-7/16