5/16-Inch Magnetic Nut Driver Cushion-Grip
646-5/16M - spec sheet
Features
- Internal flanges provide solid, twist-resistant shank anchor
- Made in USA
- Cushion-Grip™ handle allows for greater torque and comfort and handle end is color coded for easy identification
- Hollow shaft facilitates work on bolt applications
- Exclusive hollow shaft design with Rare-Earth magnetic tip features unobstructed pass through, even on long bolts
Warnings
- Always wear approved eye protection.
- NOT insulated. Will NOT protect against electrical shock.
646-5/16M - spec sheet
Manufacturer Resources
Spec Sheet
Product Specs
- Color Code:
- Yellow
- Insulated:
- No
- Magnetic:
- Yes
- Measurement Standard:
- SAE
- Nut Driver Sizes:
- 5/16"
- Overall Length:
- 9.75" (24.8 cm)
- Shaft Length:
- 6" (15.2 cm)
- Department:
- Electrical
- Product Group:
- Hand Tools
- Product Subgroup:
- Screwdrivers & Drivers
- Product Height:
- 1.0000 in
- Product Weight:
- 0.2500 lbs
- Product Width:
- 1.0000 in
- Product Depth:
- 9.7500 in
- Product Type:
- Nut Driver
- Country of Origin:
- United States
Klein Tools 646-5/16M – Frequently Asked Questions
1) Can the Klein 646-5/16M nut driver be used on live electrical work?
No. The 646-5/16M is not insulated and will not protect against electrical shock, so keep it off energized work. For live panel work you need a VDE-rated insulated driver. The shaft is also magnetic, which is fine for holding sheet metal screws and hex head bolts but is another reason to treat it as a de-energized-only tool.
2) Will the Klein 646-5/16M pass over a long bolt or threaded rod?
Yes. The 5/16 inch shaft is hollow all the way through, so it slides down over long bolts or studs instead of bottoming out on the thread. The rare-earth magnetic tip still holds the nut while the bolt passes through the shank. That is the difference between this and a solid-shank 5/16 driver, which stops as soon as the thread fills the socket.
3) How deep can the Klein 646-5/16M reach into a panel or strut channel?
The shank is 6 inches (15.2 cm) long, with an overall length of 9.75 inches (24.8 cm) including the Cushion-Grip handle. That 6 inch reach clears most recessed hex head screws in load centers, enclosures and strut, but if you are working at the back of a deep gear cabinet you want a longer shank or an extension on a ratchet.
4) How do I tell the 5/16 driver apart from the rest of the set in my pouch?
By the handle end. Klein color codes the Cushion-Grip handle end by size, and the 5/16 inch 646-5/16M is yellow. Pull it by color rather than reading the stamp, which is what most electricians and HVAC techs do once a full set of 646 drivers is in the bag.
5) Will the shank spin loose in the handle under heavy torque?
The handle has internal flanges that anchor the shank, so it resists twisting out under load. The Cushion-Grip handle is also sized for leverage rather than a slim precision grip, which is what you want when you are breaking loose hex head lags or sheet metal screws that have been in place a while.
6) Is the Klein 646-5/16M made in the USA?
Yes, the 646-5/16M magnetic nut driver is made in the USA. That matters for MRO and institutional buyers working under domestic-sourcing purchasing rules.
7) How much does the Klein 646-5/16M weigh for a service bag or tool list?
A quarter pound, 0.25 lbs, at 9.75 inches long. Light enough to live in a pouch alongside the rest of a 646 series set rather than in the truck.
How fast can I get the Klein Tools 646-5/16M 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 646-5/16M come with a warranty?
Absolutely. The Klein Tools 646-5/16M 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 646-5/16M?
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