Klein Tools 646 Magnetic Tip N...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$14.29
Klein Tools 646 Magnetic Tip Nut Driver, 6-Inch Hollow Shaft

Klein Tools 646 Magnetic Tip Nut Driver, 6-Inch Hollow Shaft

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Model: 646-1/4M

In Stock (leaves warehouse same day if ordered before 3pm ET)

$14.29
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11/32-Inch Magnetic Nut Driver 6-Inch Hollow Shaft

  • Features

    • Internal flanges provide solid, twist-resistant shaft anchor
    • Cushion-Grip™ handle allows for greater torque and comfort and handle dome is color coded for easy identification
    • Made in USA
    • Exclusive hollow shaft design with Rare-Earth magnetic tip features unobstructed pass through, even on long bolts
    • Full hollow shaft facilitates work on long bolt applications

  • Warnings

    • NOT insulated. Will NOT protect against electrical shock.
    • Always wear approved eye protection.


646-11/32M - spec sheet

Product Specs

Insulated:
No
Department:
Electrical
Measurement Standard:
SAE
Product Type:
Nut Driver
Shaft Length:
6" (15.2 cm)
Product Width:
1.0000 in
Magnetic:
Yes
Product Subgroup:
Screwdrivers & Drivers
Product Height:
1.0000 in
Product Group:
Hand Tools

Klein Tools 646-1/4M – Frequently Asked Questions

1) What sizes does the Klein 646 magnetic nut driver come in?
Three SAE hex sizes: 1/4-Inch (646-1/4M), 11/32-Inch (646-11/32M), and 1/2-Inch (646-1/2M). All three use the 6-inch hollow shaft. Sizes are SAE, not metric, so if your fasteners are metric you need a different driver.
2) Can I use the Klein 646 nut driver on live electrical work?
No. The 646 is not insulated and will not protect against electrical shock. Power down and lock out before using it. If you need to work on or near energized conductors, buy a driver rated and marked as insulated instead.
3) Will a hollow shaft nut driver work on a long threaded rod or bolt sticking through?
That's exactly what the hollow shaft is for. The 646 is hollow the full 6 inches, so a long bolt or threaded rod passes straight up through the shaft instead of bottoming out and stopping the nut from seating. A solid-shaft driver stalls as soon as the stud reaches the socket depth.
4) Does the magnetic tip hold the nut or screw by itself for one-handed starts?
Yes. The tip uses a rare-earth magnet, so it grabs and holds a steel nut or hex-head screw while you start it. That matters in panel work and overhead runs where you only have one hand free. Note the magnet only holds ferrous fasteners, so brass or stainless hardware won't stick.
5) Is the 646 nut driver shaft going to spin loose in the handle under torque?
The handle uses internal flanges that anchor the shaft against twisting, and the Cushion-Grip handle is built to take higher torque. It's a hand driver, though, so don't put it in an impact or drill.
6) If I stock several sizes of these nut drivers, how do techs tell them apart in the pouch?
The handle dome is color coded by size, so a tech pulls the right one out of the pouch without reading the stamp. Useful for a crew or MRO cart carrying the 1/4, 11/32, and 1/2 inch together.
7) Are Klein 646 nut drivers made in the USA?
Yes, the 646 series hollow-shaft magnetic nut drivers are made in the USA. That matters if you're buying against a domestic-content requirement on a government or institutional order.
How fast can I get the Klein Tools 646-1/4M delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools 646-1/4M come with a warranty?
Absolutely. The Klein Tools 646-1/4M is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools 646-1/4M?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools 646-1/4M from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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