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Klein Tools 3/8-Inch Nut Driver with 3-Inch Hollow Shaft and Cushion-Grip Handle
Professional precision tool with hollow shaft design for extended bolt applications
Klein Tools delivers professional-grade performance with this 3/8-inch nut driver featuring a 3-inch hollow shaft design. Built with premium chrome-plated steel construction and Cushion-Grip handle, this tool provides reliable torque application and comfort for electrical and mechanical applications. The hollow shaft design facilitates work on stacked circuit boards and long bolt applications where standard drivers cannot reach.
Professional Features & Benefits
- 3/8-Inch Size with Hollow Shaft: Enables work on long bolts and studs while providing precise fit for 3/8-inch fasteners
- Premium Chrome Plating: Delivers smooth operation and corrosion resistance for long-lasting professional use
- Cushion-Grip Handle: Allows for greater torque application and enhanced comfort during extended use
- Tip-Ident System: Provides quick identification of nut driver size with color-coded handle end for efficient tool selection
- Internal Flanges: Ensure solid, twist-resistant shaft anchor for reliable torque transfer
- ASME/ANSI Compliance: Meets or exceeds applicable specifications for professional tool standards
- Made in USA: Ensures consistent quality and manufacturing standards for professional applications
Technical Specifications
- Color Code: Blue
- Department: Electrical
- Depth: 6.7500 in
- Handle Material: Rubber
- Height: 0.9000 in
- Insulated: No
- Magnetic: No
- Material: Steel
- Measurement Standard: SAE
- Nut Driver Sizes: 3/8"
- Overall Length: 6.75" (17.2 cm)
- Product Group: Hand Tools
- Product Subgroup: Screwdrivers & Drivers
- Shaft Length: 3" (7.6 cm)
- Weight: 0.2000 lbs
- Width: 2.3670 in
Professional Applications
- Electrical panel and junction box assembly
- Circuit board installation and maintenance
- HVAC equipment fastening applications
- Industrial machinery assembly and repair
- Commercial electrical installations
- Maintenance and service operations
- Professional contractor applications
Why Choose Klein Tools Quality?
Klein Tools maintains professional standards with premium chrome-plated construction, ASME/ANSI specification compliance, and Made in USA manufacturing. The Cushion-Grip handle design and internal flange construction ensure reliable performance and durability for demanding professional applications.
Manufacturer Resources
630-3/8 Spec Sheet
Product Specs
- Department:
- Electrical
- Insulated:
- No
- Product Material:
- Steel
- Handle Material:
- Rubber
- Color Code:
- Blue
- Measurement Standard:
- SAE
- Shaft Length:
- 3" (7.6 cm)
- Product Depth:
- 6.7500 in
- Nut Driver Sizes:
- 3/8"
- Product Subgroup:
- Screwdrivers & Drivers
- Overall Length:
- 6.75" (17.2 cm)
- Product Group:
- Hand Tools
- Product Weight:
- 0.2000 lbs
- Product Type:
- Nut Driver
- Country of Origin:
- United States
Klein Tools 630-3/8 – Frequently Asked Questions
1) What size nut does the Klein 630-3/8 nut driver fit, and is it SAE or metric?
It drives 3/8 inch hex fasteners, and it's an SAE (inch) tool, not metric. There's no close metric equivalent that seats properly, so if the panel hardware is metric you want a metric driver instead. The handle end is color coded blue with Klein's Tip-Ident so you can pick it out of a pouch without reading the shaft.
2) Does the hollow shaft on this 3/8-inch nut driver let it run down a long bolt or stud?
Yes. The shaft is hollow, so a protruding bolt or stud passes up inside it instead of bottoming out the socket. The shaft is 3 inches long (7.6 cm), which is how much thread it will swallow before the handle contacts the work. Overall tool length is 6.75 inches (17.2 cm), so it's a short-reach driver, good for stacked boards and panel hardware rather than deep recessed work.
3) Is this Klein nut driver insulated for work on live electrical circuits?
No. This one is not insulated, so it is not rated for live work. If you need protection at voltage, choose a 1000V-rated insulated nut driver instead. Untouched conductors only with this tool.
4) Should I order the magnetic tip or the standard cushion-grip 3/8-inch nut driver?
Two versions are offered. The standard cushion-grip tip is part 630-3/8. The magnetic tip version is 630-3/8M, and that's the one to take if you're setting sheet metal screws or nuts one-handed overhead in a panel or on HVAC equipment where a dropped fastener is lost. Note the magnet fights you a bit around circuit boards and loose steel debris, so a lot of electricians keep both.
5) Is a 3/8-inch hollow-shaft nut driver the right tool for electrical panel work, or should I use a socket and ratchet?
For panel and junction box assembly the nut driver wins on speed and control: one hand, no ratchet swing room needed, and the cushion grip lets you put real torque on a 3/8 nut without a wrench. Where it gives up ground is reach and torque limits. The shaft is only 3 inches, so anything deep in a gutter or on a long stud past that depth wants a socket on an extension. Klein's version also covers stacked circuit board standoffs, which a socket can't clear.
6) Does this Klein nut driver meet ASME/ANSI tool specs, and where is it made?
It meets or exceeds the applicable ASME/ANSI specifications for hand tools and is made in the USA, which matters if you're buying against a spec sheet or a domestic-content requirement on institutional or government work.
7) What is the handle and shaft made of on the Klein 630 series 3/8-inch driver?
Steel shaft, chrome plated for corrosion resistance, anchored into a rubber Cushion-Grip handle. Internal flanges lock the shaft in the handle so it doesn't spin loose when you lean on it. At 0.2 lbs it's light enough to live in a pouch all day.
How fast can I get the Klein Tools 630-3/8 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 630-3/8 come with a warranty?
Absolutely. The Klein Tools 630-3/8 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 630-3/8?
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
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