Greenlee K3P Standard Round Kn...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$60.24
Greenlee K3P Standard Round Knockout Punch, Mild Steel

Greenlee K3P Standard Round Knockout Punch, Mild Steel

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Model: K3P-3/4

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

$60.24
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Greenlee K3P Standard Round Knockout Punch, Mild Steel

The Greenlee K3P Standard Round Knockout Punch is a conduit-size round punch built for creating clean, precise conductor openings in electrical enclosures, panels, and boxes. Available in 3/4" and 1" sizes, this punch is optimized for mild steel and offers limited stainless steel capability, punching 10 ga mild steel or 12 ga stainless steel with ease. It replaces the Greenlee 125AV and is engineered for use with Greenlee battery-hydraulic knockout drivers, manual-hydraulic knockout drivers, or a ratchet wrench, making it a versatile addition to any electrician's or fabricator's toolkit. Made in USA, the K3P delivers the durability and repeatable accuracy professionals expect from Greenlee punch tooling.

Key Features

  • Trade Size Range: Available in 3/4" and 1" sizes for standard conduit-size knockouts in electrical enclosures and panels.
  • Round Punch Design: Standard round punch shape for conduit-size knockouts.
  • Material Capacity: Optimized for mild steel with the ability to punch 10 ga mild steel or 12 ga stainless steel, plus limited stainless steel capability.
  • Multi-Material Compatibility: Suitable for use in mild steel, stainless steel, brass, copper, aluminum, fiberglass, and plastics.
  • Direct Replacement: Replaces the Greenlee 125AV punch for straightforward tooling upgrades or replacements.
  • Laser Markings: Laser-etched markings allow for quick and accurate part identification on the job or in the shop.
  • Knurled Edge Grip: A knurled edge improves handling and grip during setup and operation.
  • Driver Compatibility: Works with Greenlee battery-hydraulic knockout drivers, manual-hydraulic knockout drivers, or a ratchet wrench, and pairs with Greenlee dies and draw studs.
  • Made in USA: Manufactured in the United States to Greenlee's quality standards for professional-grade tooling.

Technical Specifications

  • Available Sizes: 3/4", 1".
  • Capacity: Optimized for mild steel. Limited stainless steel capability.
  • Thickness: Punch 10 ga mild steel or 12 ga stainless steel.
  • Type: Standard Round Punch.
  • Material: For use in mild steel, stainless steel, brass, copper, aluminum, fiberglass and plastics.
  • Shape: Round.

Typical Applications

  • Electrical Panel and Enclosure Fabrication
  • Conduit Knockout Creation in Mild Steel and Stainless Steel
  • Custom Cutouts in Brass, Copper, Aluminum, Fiberglass, and Plastic Panels
  • Field Installation with Battery-Hydraulic or Manual-Hydraulic Knockout Drivers
  • Replacement Tooling for Greenlee 125AV Punch Setups

Why Greenlee?

Greenlee builds knockout punch tooling engineered for reliable, repeatable performance across mild steel, stainless steel, and a range of other materials. The K3P's laser markings and knurled edge grip make it easy to identify and confidently handle on the job, while its Made in USA construction and compatibility with the full line of Greenlee knockout drivers, dies, and draw studs reinforce its place as dependable, code-compliant tooling for professional electrical installation and fabrication work across both the 3/4" and 1" sizes in this family.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
GREE-20260923
Product Type:
Knockout Punch
Configuration:
Round
Country Of Origin:
United States
Department:
Electrical
Product Subgroup:
Knockout Punches
Product Material:
Mild Steel
Product Details:
Standard Round Punch
Product Group:
Electrical Installation Tools

Greenlee K3P-3/4 – Frequently Asked Questions

1) What sizes does the Greenlee K3P knockout punch come in, and what are the part numbers?
The K3P round punch is sold in two conduit trade sizes: 3/4 inch (K3P-3/4) and 1 inch (K3P-1). Both are standard round punches for conduit-size openings in enclosures and panels.
2) How thick a panel can the Greenlee K3P punch through?
It is rated to punch 10 gauge mild steel or 12 gauge stainless steel. Mild steel is where it is optimized; stainless capability is limited, so for heavy stainless work step up to tooling rated for it rather than pushing this punch.
3) Does the Greenlee K3P replace the older 125AV punch?
Yes, the K3P is a direct replacement for the Greenlee 125AV punch, so an existing 125AV setup can be re-tooled with it.
4) What else do I need to actually use a K3P punch on the job?
The punch is one piece of a three-part set. You also need the matching Greenlee die and a draw stud, plus a drive source: a Greenlee battery-hydraulic knockout driver, a manual-hydraulic driver, or a ratchet wrench. You also need a pilot hole for the draw stud. Order the punch, die and stud as a set if you do not already have them.
5) Will the K3P punch work in aluminum, copper, or fiberglass panels, not just steel?
Yes. The K3P is listed for use in mild steel, stainless steel, brass, copper, aluminum, fiberglass and plastics, so it handles non-ferrous panels and composite enclosure walls as well as steel boxes.
6) Is the Greenlee K3P made in the USA?
Yes, country of origin is the United States, which matters on public and federally funded jobs with domestic sourcing requirements.
7) Is this a round punch or a square one, and what shape hole does it leave?
Round. The K3P is a standard round punch that leaves a clean conduit-size conductor opening. For square or D-shaped cutouts you need a different punch configuration.
8) How do I tell K3P punch sizes apart once they are mixed in the toolbox?
Each punch carries laser-etched markings for quick size identification, and the knurled outer edge gives you grip when threading it onto the draw stud with greasy hands.
How fast can I get the Greenlee K3P-3/4 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 K3P-3/4 come with a warranty?
Absolutely. The Greenlee K3P-3/4 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 K3P-3/4?
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 K3P-3/4 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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