Milwaukee 48-22-2521 1/4 in. M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.71
Milwaukee 48-22-2521 1/4 in. Magnetic HollowCore Nut Driver

Milwaukee 48-22-2521 1/4 in. Magnetic HollowCore Nut Driver

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Model: 48-22-2521

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

$13.71
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Milwaukee 48-22-2521 1/4 in. Magnetic HollowCore Nut Driver

The Milwaukee 48-22-2521 1/4 in. Magnetic HollowCore Nut Driver is engineered for fast, secure fastening wherever hex nuts and bolts need to be run down quickly and accurately. Sized at 1/4 in., this nut driver features Milwaukee HollowCore shaft design, bored straight through the tool so it can slide directly over long bolts, screws, threaded rod, and all-thread without the fastener needing to be trimmed to length first. A magnetic tip at the working end grips fasteners on contact, holding them steady for confident one-handed starts even when working overhead or inside tight enclosures. Whether it is used for electrical panel assembly, conduit and fitting hardware, or general mechanical fastening, the Milwaukee 48-22-2521 is built to help professionals move through repetitive fastening tasks with fewer dropped fasteners and less downtime on the jobsite. This driver is equally at home in an electricians tool pouch or a maintenance techs toolbox, keeping repetitive fastening tasks moving without swapping tools.

Key Features

  • Trade Size: 1/4 in. drive size fits standard hex fasteners for panel, enclosure, and equipment assembly work.
  • HollowCore Shaft Design: The hollow-core construction runs the full length of the shaft, allowing the driver to pass over long bolts, screws, and threaded rod without cutting the fastener down first, which saves time on repetitive tasks.
  • Magnetic Tip: A built-in magnetic tip grips fasteners securely, reducing dropped hardware and speeding up one-handed starts in tight, overhead, or hard-to-reach spaces.
  • Compact, Purpose-Built Driver: Sized specifically as a 1/4 in. nut driver for quick, repeatable access to hex nuts and bolts in electrical, HVAC, and general maintenance applications.
  • Efficient One-Handed Operation: The combination of the HollowCore shaft and magnetic tip lets users start and run fasteners without repositioning hardware or switching tools mid-task.
  • Dedicated 1/4 in. Sizing: A single, purpose-built 1/4 in. size keeps this driver ready for repeat use on common hex fastener sizes without needing a full driver set on hand.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Electrical Panel and Enclosure Assembly
  • Conduit, Fitting, and Hardware Installation
  • HVAC and Mechanical Fastening
  • General Maintenance and Repair Work
  • Field Service and Jobsite Assembly
  • Equipment and Machinery Fastener Installation

Why Milwaukee?

Milwaukee engineers its HollowCore nut drivers to keep pace with demanding jobsite use, combining a hollow shaft design that works over long fasteners with a magnetic tip that keeps hardware in place during installation. The 48-22-2521 delivers the dependable, purpose-built performance professionals expect from Milwaukee hand tools, helping electricians and technicians work faster and more efficiently on repetitive fastening tasks. From panel assembly to general repair work, this 1/4 in. nut driver is designed to be a reliable, go-to tool on the jobsite. Backed by Milwaukee, a brand recognized among trade professionals for tools built to withstand daily jobsite use, the 48-22-2521 is a straightforward, dependable choice for anyone who needs a dedicated 1/4 in. nut driver on hand.

Manufacturer Resources

Product Specs

Product Type:
Nut Driver
Department:
Electrical
Product Subgroup:
Screwdrivers & Drivers
list_batch:
MWK-20260918
Handle Type:
Straight
Handle Material:
Plastic
Product Length:
7 in
Product Group:
Hand Tools

Milwaukee 48-22-2521 – Frequently Asked Questions

1) What does HollowCore mean on a Milwaukee nut driver, and when would I actually need it?
The shaft on the Milwaukee 48-22-2521 is bored straight through from tip to handle, so the driver slides down over a long bolt, screw, or piece of threaded rod instead of stopping against the end of it. That matters when you are running nuts onto all-thread hangers or long panel bolts you would otherwise have to cut down to get a standard nut driver seated. A solid-shaft driver bottoms out on the fastener; this one does not.
2) Does 1/4 in. on this nut driver mean the nut size or the shank size?
It is the trade size of the hex opening, so the 48-22-2521 drives 1/4 in. hex nuts and bolt heads, the common size for sheet metal screws, panel hardware, and enclosure fasteners. If you are working 3/8 hex, order the 48-22-2524 instead.
3) What sizes does the Milwaukee HollowCore magnetic nut driver come in?
Two trade sizes: 1/4 in., model 48-22-2521, and 3/8 in., model 48-22-2524. Both are the same magnetic HollowCore design, so if you are running both 1/4 and 3/8 hex hardware on panel and enclosure work you need both part numbers.
4) Will the magnetic tip hold a hex nut for a one-handed start overhead?
Yes. The working end has a built-in magnetic tip that grips the fastener on contact, which is what lets you start a nut one-handed overhead or reaching into an enclosure without a second hand steadying the hardware. It cuts down on dropped nuts into the bottom of a panel.
5) How long is the Milwaukee 48-22-2521 nut driver overall?
Overall length is 7 inches. That is a full-size straight-handle driver, not a stubby, so plan on roughly 7 inches of clearance in front of the fastener. In a shallow enclosure or between closely spaced gear, a stubby or a socket on a ratchet gets in where this will not.
6) Is this a cordless driver bit or a hand tool?
It is a hand tool, a straight-handle nut driver with a plastic handle. There is no hex shank spec given for chucking it into a drill or impact, so treat it as a pouch tool for hand-driving and final snugging rather than a power bit.
7) Is this nut driver suitable for HVAC sheet metal screws and not just electrical work?
Yes. Although it is catalogued for electrical use, the applications named include HVAC and mechanical fastening, conduit and fitting hardware, equipment assembly, and general maintenance and repair. A 1/4 in. hex driver is the standard tool for self-tapping sheet metal screws on duct and equipment panels.
How fast can I get the Milwaukee 48-22-2521 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 Milwaukee 48-22-2521 come with a warranty?
Absolutely. The Milwaukee 48-22-2521 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 Milwaukee 48-22-2521?
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 Milwaukee 48-22-2521 from ZenSupply?
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