Greenlee 51046520 3-1/2" Condu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$401.83
$264.33
Greenlee 51046520 3-1/2" Conduit Size Die

Greenlee 51046520 3-1/2" Conduit Size Knockout Punch Die

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Model: 51046520
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$401.83
$264.33
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Greenlee 51046520 3-1/2" Conduit Size Knockout Punch Die

The Greenlee 51046520 3-1/2" Conduit Size Die is a replacement knockout punch die sized to produce a clean, precise 3-1/2" conduit-size opening in electrical enclosures, panels, and boxes. Designed to work with compatible Greenlee knockout punch driver systems, this die delivers the accurate round cutout required for standard 3-1/2" conduit fittings, making it an essential component for electricians, panel shops, and industrial maintenance crews who need dependable, repeatable knockout sizing on the job site or in the shop. Sourced and manufactured in the United States, this die is intended as a direct-fit replacement or addition to an existing Greenlee punch die set, helping crews maintain a complete range of trade sizes without replacing an entire driver kit.

Key Features

  • Trade Size: Produces a 3-1/2" conduit-size knockout opening for standard conduit fittings.
  • Purpose-Built Die: Engineered specifically as a conduit size die for use with compatible Greenlee knockout punch driver systems.
  • Precise Cutout: Delivers a clean, accurately sized hole for reliable conduit fitting installation without oversized or ragged edges.
  • Compact Dimensions: Measures 7.400 IN in length, 6.700 IN in width, and 4.700 IN in height for easy handling and storage.
  • Domestic Manufacturing: Made in the US, supporting consistent quality control for professional electrical tooling.
  • Replacement-Ready: Suitable as a standalone replacement die for expanding or maintaining an existing Greenlee knockout punch die inventory.

Technical Specifications

  • Country Of Origin: US
  • Product Height: 4.700 IN
  • Product Length: 7.400 IN
  • Product Width: 6.700 IN
  • Volume: 233.026 CI

Typical Applications

  • Electrical Panel and Enclosure Fabrication
  • Commercial and Industrial Electrical Installations
  • Conduit Entry Point Preparation
  • Panel Shop and Field Modification Work
  • Maintenance and Retrofit Projects Requiring Conduit Knockouts

Why Greenlee?

Greenlee is a trusted name among electricians and panel fabricators for precision-engineered tooling that produces consistent, code-ready results. This US-manufactured 3-1/2" conduit size die is built to deliver the accurate knockout dimensions professionals rely on for dependable conduit fitting installation. Choosing genuine Greenlee dies helps maintain compatibility and performance across your existing knockout punch driver system, ensuring every cutout matches the exacting standards electrical contractors expect from a full Greenlee die set.

Manufacturer Resources

Product Specs

Country Of Origin:
US
Product Height:
4.700 IN
Product Length:
7.400 IN
Product Width:
6.700 IN
Volume:
233.026 CI
Product Type:
Conduit
Department:
Electrical
Product Subgroup:
Knockout Punches

Greenlee 51046520 – Frequently Asked Questions

1) What size hole does the Greenlee 51046520 die punch?
The 51046520 is a 3-1/2 inch conduit size die, meaning it cuts the 4.000 inch (102.700 mm) round knockout that 3-1/2 inch trade size conduit needs. The conduit trade size and the actual hole diameter are different numbers, so if you are working from a hole diameter on a drawing, match it to the 4.000 inch figure, not the 3-1/2 inch name.
2) Will this Greenlee conduit die work with my existing knockout punch driver?
It is built for a 4.000 inch standard round knockout punch unit, so it mates with standard round knockout punch tooling at that size. It is a die only, part of a punch and die set, not a complete punch assembly with a draw stud or ram.
3) Is the Greenlee 51046520 a complete knockout punch kit or just the die?
Just the die. The 51046520 covers the die half for a 4.000 inch standard round knockout, so you supply the matching punch, draw stud and driver (hydraulic, battery or manual ram) yourself. Order the mating punch for the same 4.000 inch hole or the set will not cut.
4) How big is the Greenlee 51046520 die and will it fit in my tool case?
Packaged, the 51046520 measures 7.400 inches long by 6.700 inches wide by 4.700 inches high, about 233 cubic inches of space. Plan a slot in the punch case rather than a pouch, since large-diameter dies like this one are bulky next to the small conduit sizes.
5) Is the Greenlee 3-1/2 inch conduit die made in the USA?
Country of origin on the 51046520 die is the US, which matters on federally funded and Buy American jobs where tooling origin gets documented alongside materials.
How fast can I get the Greenlee 51046520 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 Greenlee 51046520 come with a warranty?
Absolutely. The Greenlee 51046520 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 Greenlee 51046520?
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 Greenlee 51046520 from ZenSupply?
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