Irwin 3547 Magnetic Hex Nutset...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.45
Irwin 3547 Magnetic Hex Nutsetter with Lobular Drive Design

Irwin 3547 Magnetic Hex Nutsetter with Lobular Drive Design

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Model: 3547321C

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

$4.45
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Irwin 3547 Magnetic Hex Nutsetter with Lobular Drive Design

The Irwin 3547 Magnetic Hex Nutsetter is a precision-engineered driving tool built for use with sheet metal screws and other hexagonal head fasteners. Its distinctive lobular design drives the fastener along its sides rather than forcing the corners to rotate, which significantly reduces stripping damage compared to a standard hex socket. This nutsetter is available in 5/16 inch and 3/8 inch sizes, giving installers the flexibility to match the tool to the fastener size at hand, and each unit is packaged one per pack (Pack Qty: 1) for straightforward inventory management and replacement. The magnetic tip holds fasteners firmly in place for fast, accurate, one-handed driving, whether tackling sheet metal screw installation, general fabrication, or assembly work.

Key Features

  • Lobular Drive Design: Engages the sides of the fastener instead of forcing the corners to turn, reducing stripping damage and extending fastener life.
  • Improved Corner Clearance: Provides more clearance on the corners of the fastener where paint build-up can occur, helping maintain a secure, consistent drive.
  • Broad Fastener Compatibility: Designed for use with sheet metal screws and other hexagonal head fasteners across a range of fastening tasks.
  • Magnetic Tip Retention: Helps hold the fastener securely in place during driving, supporting faster, more efficient, one-handed operation.
  • Available Sizes: Offered in 5/16 inch and 3/8 inch sizes to match a variety of hexagonal head fastener dimensions.
  • Single-Unit Packaging: Packaged one per unit (Pack Qty: 1), making it easy to stock, restock, and replace as needed.

Technical Specifications

  • Pack Qty: 1

Typical Applications

  • Sheet Metal Screw Driving
  • Hexagonal Head Fastener Installation
  • Painted or Coated Fastener Applications Where Corner Clearance Matters
  • General Fabrication and Assembly Work
  • Professional and DIY Fastening Tasks

Why Irwin?

Irwin engineers its nutsetters with a lobular drive design specifically to reduce fastener stripping and extend the working life of both the tool and the fastener it drives. This attention to design detail helps professionals and DIYers alike achieve a secure, consistent drive on hexagonal head fasteners, even in applications where paint build-up would otherwise interfere with a clean fit. The Irwin 3547 is also part of the broader Irwin lineup of lobular-design nutsetter tools, giving users a consistent, dependable driving experience across their fastening projects. Available in 5/16 inch and 3/8 inch sizes, the Irwin 3547 Magnetic Hex Nutsetter delivers dependable performance across a range of fastening projects.

Manufacturer Resources

Spec Sheet

Product Specs

Description:
Magnetic Nutsetter
Pack Qty:
1
list_batch:
IRW-20260923
Product Type:
Nut Setter
Configuration:
Lobular Drive Design
Department:
Electrical
Product Subgroup:
Screwdrivers & Drivers
Product Width:
1.9 inches
Product Group:
Hand Tools

Irwin 3547321C – Frequently Asked Questions

1) What sizes does the Irwin 3547 magnetic nutsetter come in, and which part number is which?
Two sizes. The 5/16 inch nutsetter is MPN 3547321C and the 3/8 inch is MPN 3547521C. Match the size to the hex head on your screw, not to the screw diameter: 5/16 covers most #8 and #10 hex washer head sheet metal screws, 3/8 the larger heads. Each is sold one per pack.
2) Will a magnetic hex nutsetter chew up the corners of hex head screws like a regular socket does?
That is exactly what the lobular drive on the Irwin 3547 is built to avoid. Instead of loading the six corners of the hex head, it drives against the flats, so the corners are not the thing taking the torque and the head is far less likely to round off. It also leaves extra clearance at the corners, which matters on painted or powder coated fasteners where paint build-up stops a tight-tolerance socket from seating fully.
3) Can I run this nutsetter in a cordless impact driver, or is it for a drill chuck?
The 3547 is a hex-shank nutsetter, so it goes into a 1/4 inch hex quick-change holder on an impact driver or screwgun, or into a drill's three-jaw chuck if that is what you have on the ladder. For deck and roofing panel work most installers run it in an impact driver with a depth-sensitive or clutch setting so the screw seats without over-driving the washer.
4) Does the magnetic tip actually hold the screw so I can start it one-handed?
Yes. The magnet in the socket holds a steel hex head screw in place while you line it up, which is the whole point when you are on a lift or a roof deck with one hand on the tool and the other on something else. It will not hold stainless or non-ferrous fasteners, since those are not magnetic.
5) How do I order these for a crew without ending up with the wrong count?
Each Irwin 3547 nutsetter ships individually, one per pack, so the quantity you enter is the number of nutsetters you get. If your crews run both #8/#10 hex head self-drillers and the larger 3/8 head screws, stock both sizes (3547321C and 3547521C) rather than trying to make one cover both.
6) Is the Irwin 3547 nutsetter suitable for electrical work like strut and panel screws?
It is grouped with electrical tooling and it suits the hex head self-tapping screws used on strut, panel enclosures, and sheet metal duct and trim. The lobular drive helps most on screws that have been painted or coated, which covers a lot of enclosure and strut hardware.
7) Where is the Irwin 3547 nutsetter made?
The 3547 magnetic nutsetter is manufactured in China. If you are filling a government or institutional order with domestic-content requirements, that is the detail to check against your spec before you commit.
How fast can I get the Irwin 3547321C 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 Irwin 3547321C come with a warranty?
Absolutely. The Irwin 3547321C 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 Irwin 3547321C?
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 Irwin 3547321C from ZenSupply?
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