Klein Tools 5/16-Inch Nut Driv...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12.30
Klein Tools 5/16-Inch Nut Driver

Klein Tools 5/16-Inch Nut Driver

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Model: 630-5/16M

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

$12.30
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Klein Tools Nut Driver 5/16-Inch Hex Size 3-Inch Shaft Cushion Grip Chrome Plated Steel

Professional-Grade Nut Driver for Electrical and Construction Applications

The Klein Tools Nut Driver 5/16-Inch delivers professional-grade fastening performance for electrical and construction applications. This chrome-plated steel nut driver features a 3-inch hollow shaft designed for electricians, contractors, and maintenance professionals, providing the reliable performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.

Professional Features & Benefits

Premium Construction & Durability

  • Premium Chrome Plating - Provides smooth operation and superior corrosion resistance for long-lasting professional use
  • Full Hollow Shaft Design - Facilitates work on stacked circuit boards and long bolt applications with 3-inch reach
  • Internal Flanges - Provide solid, twist-resistant shaft anchor for maximum torque transfer and tool longevity
  • Made in USA Quality - American craftsmanship ensures consistent performance and reliability for professional applications

Ergonomic Design & Safety

  • Cushion-Grip Handle - Allows for greater torque application and enhanced comfort during extended use
  • Color-Coded Handle End - Provides easy size identification for quick tool selection in professional environments
  • Tip-Ident System - Quickly identifies nut driver size for efficient workflow and reduced downtime

Professional Standards & Compliance

  • ASME/ANSI Compliance - Meets or exceeds applicable specifications for professional tool standards
  • Standard Length Design - Optimized for most applications while fitting over long bolts and studs

Technical Specifications

Hex Size: 5/16-inch, Shaft Length: 3 inches (7.6 cm), Overall Length: 6.75 inches (17.2 cm), Width: 2.37 inches, Height: 0.9 inches, Weight: 0.2 lbs, Handle Material: Cushion-Grip rubber, Construction: Chrome-plated steel, Finish: Premium chrome plating, Insulation: Not insulated (not for electrical shock protection)

Installation & Usage

  1. Select appropriate 5/16-inch hex nuts or bolts for your application
  2. Position nut driver squarely on fastener head to prevent slipping and damage
  3. Apply steady downward pressure while turning to ensure proper engagement
  4. Utilize Cushion-Grip handle for maximum torque transfer and comfort
  5. Take advantage of hollow shaft design for long bolt and stud applications
  6. Always wear approved eye protection during use as tool is not insulated

Professional Applications

Ideal for:

  • Electrical Installation - Panel assembly, conduit mounting, and electrical box installation with 5/16-inch fasteners
  • Construction Work - Structural assembly, hardware installation, and general construction fastening applications
  • HVAC Systems - Equipment mounting, ductwork assembly, and mechanical system installation
  • Industrial Maintenance - Equipment repair, machinery assembly, and facility maintenance tasks
  • Telecommunications - Equipment rack assembly, cable management systems, and infrastructure installation
  • Automotive Applications - Engine work, chassis assembly, and mechanical repair tasks
  • Appliance Repair - Service work on household and commercial appliances with hex fasteners
  • Circuit Board Work - Stacked board applications utilizing full hollow shaft design

Hollow Shaft Advantage

Klein Tools hollow shaft engineering provides superior access for specialized applications including stacked circuit boards, long bolt installations, and threaded rod work. The full hollow design allows the driver to slide over extended fasteners while maintaining tool strength and precision, making it essential for electrical panel work and electronic assembly applications.

Why Choose Klein Tools Quality?

Since 1857, Klein Tools has maintained its commitment to American manufacturing excellence and professional tool innovation. Each nut driver undergoes rigorous testing to meet ASME/ANSI specifications, ensuring the precision, durability, and safety standards that electrical professionals and contractors depend on for critical applications and long-term reliability.

Product Specs

Department:
Electrical
Insulated:
No
Measurement Standard:
SAE
Shaft Length:
3" (7.6 cm)
Color Code:
Yellow
Product Depth:
6.7500 in
Nut Driver Sizes:
5/16"
Magnetic:
No
Overall Length:
6.75" (17.2 cm)
Product Subgroup:
Screwdrivers & Drivers
Product Group:
Hand Tools
Product Weight:
0.2000 lbs
Product Type:
Nut Driver

Klein Tools 630-5/16M – Frequently Asked Questions

1) What is the difference between Klein 630-5/16 and 630-5/16M nut drivers?
Both are 5/16-inch cushion-grip nut drivers with a 3-inch shaft and 6.75-inch overall length. The 630-5/16 is the solid shaft version; the 630-5/16M is the hollow shaft version, which lets the driver slide down over a long bolt, stud, or threaded rod instead of bottoming out on it. If you are working panel screws and sheet metal hex heads, solid is fine. If you turn nuts partway down long studs or stacked boards, order the M.
2) How deep can this nut driver reach down a bolt or into a panel?
The shaft is 3 inches long with a 6.75-inch overall length, so you get 3 inches of reach from the handle face. On the hollow shaft 630-5/16M, that full 3 inches is open bore, so the driver can ride down over a stud or long bolt for the whole length. Recessed fasteners deeper than 3 inches need a longer driver or a socket on an extension.
3) Will this 5/16-inch nut driver hold the screw magnetically?
No, the 5/16-inch Klein nut driver is non-magnetic. You have to hold the nut or hex-head screw on the fastener yourself to start it. For overhead panel and strut work where dropping a screw costs you time, that matters, so plan on a magnetizer or a magnetic-tip driver for those spots.
4) Is the 5/16 marking on this Klein nut driver inch or metric?
Inch. It is an SAE size, 5/16-inch hex, so it fits 5/16 inch across-the-flats nuts and hex-head sheet metal screws. It is not an 8mm driver, and while 8mm is close to 5/16 it is not the same, so do not substitute one for the other on tight or soft fasteners.
5) Is a nut driver the right tool for 5/16 hex screws, or should I use a socket and ratchet?
A 5/16 nut driver is for fasteners you turn by hand at low to moderate torque: panel covers, box screws, strut and duct sheet metal screws, equipment rack hardware. It gives you one-handed control and feel. Once a fastener needs real torque or is set deep in a housing, switch to a 5/16 socket on a ratchet or extension. The cushion-grip handle on this one lets you apply more twist than a bare plastic handle, but it is still a hand-torque tool at 0.2 lbs.
6) How do I tell this 5/16 driver apart from the rest of my Klein nut drivers in the pouch?
The handle end is color coded yellow for 5/16-inch, and Klein's Tip-Ident marks the size on the tool itself. If you are standardizing a maintenance crew's pouches, the color code is what gets the right size picked without reading stamped numbers in a dark panel.
7) Will the hollow shaft version bend or twist under load?
The 630 series uses internal flanges to anchor the shaft in the handle, which is what resists twisting where the shaft meets the grip, and the shaft is chrome-plated steel. That is the usual failure point on a driver, so it is the detail worth knowing. Still, a hollow shaft has less wall than a solid one, so if the work is mostly high-torque and you do not need to clear long studs, the solid shaft 630-5/16 is the one to pick.
How fast can I get the Klein Tools 630-5/16M 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 630-5/16M come with a warranty?
Absolutely. The Klein Tools 630-5/16M 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 630-5/16M?
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 630-5/16M 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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