Klein Tools Nut Driver Set 7-P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$132.49
$76.83
Klein Tools Nut Driver Set, 3-Inch Shafts, Cushion-Grip™, 7-Piece

Klein Tools Nut Driver Set 7-Piece 3-Inch Shafts Cushion Grip Hollow Shaft Professional

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Model: 631
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$132.49
$76.83
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Klein Tools Nut Driver Set 7-Piece 3-Inch Shafts Cushion Grip Professional

Professional-Grade Hollow Shaft Nut Driver Collection

The Klein Tools 7-Piece Nut Driver Set delivers professional-grade fastening performance for electrical and construction applications. This hollow shaft nut driver collection features 3-inch shafts with Cushion-Grip™ handles designed for electricians, linemen, and electrical professionals, providing the reliable performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.

Professional Features & Benefits

Hollow Shaft Performance

  • Full Hollow Shafts - Facilitate work on long bolt applications with threaded rod pass-through capability
  • Internal Flanges - Provide solid, twist-resistant shaft anchor for maximum torque transfer
  • 3-Inch Shaft Length - Optimal reach for electrical box installations and deep socket applications
  • Professional Grade Construction - Heat-treated steel shafts deliver Klein Tools durability and precision

Ergonomic Comfort & Control

  • Cushion-Grip™ Handles - Allow for greater torque application and all-day comfort during extended use
  • Tip-Ident® Color Coding - Quickly identifies nut driver hex orientation and size by color coding handle ends
  • Easy Fastener Engagement - Color-coded system allows quick visual identification for efficient workflow

Professional Reliability

  • Made in USA Quality - Klein Tools manufacturing standards ensure consistent performance and durability
  • General-Purpose Selection - Most frequently used nut driver sizes for electrical and construction work

Technical Specifications

7-piece set includes 3/16", 1/4", 5/16", 11/32", 3/8", 7/16", and 1/2" hex sizes. 3-inch hollow shaft length with overall tool length ranging 6.75" to 7.3125". Cushion-Grip™ handle construction. Set dimensions: 7.5" W x 13.5" H x 1.5" D. Total weight: 1.5 lbs. Not insulated - not for live electrical work.

Installation & Usage

  1. Select appropriate hex size using Tip-Ident® color coding system for quick identification
  2. Insert nut driver onto hex fastener ensuring full engagement with hex socket
  3. Apply steady downward pressure while rotating clockwise to tighten or counterclockwise to loosen
  4. Utilize hollow shaft design for long bolt applications by threading rod through shaft opening
  5. Maintain firm grip on Cushion-Grip™ handle for maximum torque transfer and control
  6. Store in organized manner using color-coded identification for efficient job site workflow

Professional Applications

Ideal for:

  • Electrical Installation - Panel mounting, junction box assembly, and electrical component fastening
  • Construction Work - Structural fastening, hardware installation, and general construction applications
  • HVAC Systems - Ductwork assembly, equipment mounting, and ventilation system installation
  • Industrial Maintenance - Equipment repair, machinery assembly, and facility maintenance tasks
  • Telecommunications - Equipment rack assembly, cable management systems, and network infrastructure
  • Residential Wiring - Outlet installation, switch mounting, and home electrical projects
  • Commercial Electrical - Large-scale electrical installations and commercial building systems
  • Automotive Applications - Vehicle electrical systems and automotive repair work

Hollow Shaft Advantage

Klein Tools hollow shaft design provides superior functionality for electrical applications requiring threaded rod pass-through capability. The internal flange construction ensures twist-resistant performance while maintaining the precision and durability standards that electrical professionals demand for critical installations and long-term reliability.

Why Choose Klein Tools Quality?

Since 1857, Klein Tools has maintained its commitment to manufacturing the highest quality hand tools for electrical professionals. Each nut driver undergoes rigorous testing protocols and quality control measures, ensuring the safety standards and reliable performance that electricians and linemen trust for their most demanding applications and professional reputation.



KLN-631 - spec sheet

Manufacturer Resources

Spec Sheet

Product Specs

Handle Type:
Cushion Grip
Included:
630-3/16, 630-1/4, 630-5/16, 630-11/32, 630-3/8, 630-7/16, and 630-1/2
Insulated:
No
Measurement Standard:
SAE
Number Of Pieces:
7
Overall Length:
6.75" to 7.3125" (17.1 to 18.6 cm)
Shaft Length:
3" (7.6 cm)
Product Type:
Nut Driver Set
Department:
Electrical
Product Group:
Hand Tools
Product Subgroup:
Screwdrivers & Drivers
Product Height:
13.5000 in
Product Weight:
1.5000 lbs
Product Width:
7.5000 in
Product Depth:
1.5000 in

Klein Tools 631 – Frequently Asked Questions

1) Can I use these Klein nut drivers on live electrical work?
No. The 631 set is not insulated, so it must not be used on energized conductors or terminals. The Cushion-Grip handle is for comfort and torque, not dielectric protection. For live work you need a driver specifically rated and marked as insulated to 1000V; this set is for de-energized panel, box and equipment work.
2) Will these nut drivers go over a long threaded rod or a bolt that sticks way out?
Yes, to a point. These are full hollow shaft drivers, so a bolt or threaded rod passes up through the shaft rather than bottoming out on the tip. The usable pass-through is limited by the 3 inch shaft length, so on rod protruding more than that you will run out of shaft and need a deep socket and ratchet instead. Inside the shaft there is an internal flange anchoring it to the handle, which is what keeps it from twisting off under torque.
3) Is a 3-inch shaft long enough for reaching nuts down in a panel or deep box?
The 3 inch shaft puts overall tool length between 6.75 and 7.3125 inches (17.1 to 18.6 cm) depending on the size. That handles typical panel mounting, junction box assembly and rack hardware where the fastener sits a couple inches below the surface. If you are working at the back of a deep enclosure or down a long standoff, step up to a 6-inch shaft version of the same drivers, because reach here is fixed at 3 inches.
4) Can these be used in a drill or impact driver?
No. These are hand nut drivers with fixed Cushion-Grip handles, not bit-style drivers with a hex shank, so there is nothing to chuck up. They are meant for hand torque on sheet metal screws, ground lugs, box connectors and rack hardware. For powered work you want separate magnetic hex nut setters with a 1/4 inch shank.
5) How do you tell the sizes apart quickly on the job?
Each handle end is color coded with Klein's Tip-Ident system, so you read the size off the butt of the handle while the drivers are sitting in a pouch or tray, tips down. That is the practical difference between this and a set you have to pull and squint at. The hex size is identified by color rather than by hunting for a stamped mark on the shaft.
6) Does this Klein set come in a case, and how much room does it take in a truck drawer?
The 631 ships as a 7-piece assortment measuring 7.5 inches wide by 13.5 inches high by 1.5 inches deep and weighing 1.5 lbs total. That flat profile fits a shallow van drawer or the back pocket of a tool bag. For MRO buyers standardizing across a crew, it is a compact single line item that covers the seven most-used SAE hex sizes.
How fast can I get the Klein Tools 631 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 631 come with a warranty?
Absolutely. The Klein Tools 631 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 631?
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 631 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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