Greenlee 51040110 1" Round Con...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$92.27
$28.93
Greenlee 51040110 1" Conduit Size Die

Greenlee 51040110 1" Round Conduit Knockout Punch Die, Replacement

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Model: 51040110
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$92.27
$28.93
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Greenlee 51040110 1" Round Conduit Knockout Punch Die, Replacement

The Greenlee 51040110 is a 1" conduit size replacement die designed for use with compatible Greenlee round knockout punch sets. This die is engineered to cleanly cut a properly sized 1" conduit knockout opening in electrical enclosures, panels, boxes, and cabinets, giving electricians and installers a precise, code-ready hole for conduit entry. As a replacement die, the 51040110 lets professionals restock or replace a specific size in their existing Greenlee round knockout punch kit rather than purchasing an entirely new set, keeping crews equipped for a wide range of job-site enclosure work. Built to Greenlee's round knockout punch die specifications, the 51040110 measures 3.750 IN in length, 3.750 IN in width, and 3.750 IN in height, with a volume of 52.734375 CI. It is manufactured in the United States, reflecting Greenlee's standard for durable, professional-grade electrical tools suited to daily use on commercial and industrial job sites.

Key Features

  • Trade Size: Sized for 1" conduit knockout openings, matching standard conduit entry requirements for boxes, panels, and enclosures.
  • Replacement Die: Designed as a direct replacement component for compatible Greenlee round knockout punch sets, simplifying kit maintenance without buying a whole new set.
  • Round Configuration: Produces a clean, round 1" knockout for standard conduit and connector fittings, supporting a precise, code-ready fit.
  • Compact Dimensions: Measures 3.750 IN x 3.750 IN x 3.750 IN with a volume of 52.734375 CI for straightforward handling, transport, and storage in a tool bag or kit case.
  • Made in the USA: Manufactured in the United States as part of Greenlee's professional electrical tooling line, built for reliable field performance.

Technical Specifications

  • Country Of Origin: US
  • Product Height: 3.750 IN
  • Product Length: 3.750 IN
  • Product Width: 3.750 IN
  • Volume: 52.734375 CI
  • Product Type: Replacement, Round Knockout Punch Die
  • Trade Size: 1"

Typical Applications

  • Panelboard and Enclosure Knockout Preparation
  • Conduit Entry Point Fabrication
  • Electrical Box and Cabinet Modification
  • Replacement Component for Existing Knockout Punch Sets
  • Commercial and Industrial Electrical Installations

Why Greenlee?

Greenlee is a trusted name in professional electrical tooling, and the 51040110 replacement die reflects that standard with precise round-die construction sized specifically for 1" conduit knockouts. Manufactured in the United States, this die is built to keep Greenlee knockout punch sets performing reliably on demanding job sites without the cost of a full replacement kit, helping electricians maintain accurate, consistent knockout openings across their existing tooling investment.

Manufacturer Resources

Spec Sheet

Product Specs

Country Of Origin:
US
Product Height:
3.750 IN
Product Length:
3.750 IN
Product Type:
Replacement, Round
Product Width:
3.750 IN
Volume:
52.734375 CI
Department:
Electrical
Product Subgroup:
Knockout Punches

Greenlee 51040110 – Frequently Asked Questions

1) What size hole does the Greenlee 51040110 die actually cut?
The 51040110 is sized for 1 inch conduit, and the actual hole it produces is 1.362 inches in diameter. That is the standard clearance hole for a 1 inch conduit hub or connector, so the fitting drops in without reaming.
2) Is the Greenlee 51040110 a complete knockout punch or just the die?
Die only. The 51040110 is a replacement die for 1 inch conduit size, so you still need the matching punch and a draw stud or bolt to pull it. If your existing 1 inch punch is still good, this replaces the worn die half only.
3) Will the Greenlee 51040110 die work with my standard round knockout punch set?
Yes, it is made for standard round knockout punches in the 1 inch conduit size. It is a round die, not a square or D-shaped one, so it pairs with the round punch of the same size. Match the draw stud thread on your existing set before ordering.
4) What part number do I order to replace a worn 1 inch Greenlee round knockout die?
Greenlee 51040110 is the part number for the 1 inch conduit size round replacement die. It is made in the US. Order by that number rather than by hole size alone, since 1 inch conduit and a 1 inch hole are two different things here.
5) Can I use the 1 inch conduit die to punch a hole for something other than conduit?
Any fitting or device needing a 1.362 inch round hole works, since that is the finished hole size the die cuts. Cord grips, cable glands, and pilot lights specified at 1 inch trade size all land on that same opening.
6) How big is the Greenlee 51040110 die, and will it fit my punch case?
The die measures 3.750 x 3.750 x 3.750 inches as packed. That is the shipping envelope, useful if you are slotting it into a punch kit case or a truck drawer.
How fast can I get the Greenlee 51040110 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 51040110 come with a warranty?
Absolutely. The Greenlee 51040110 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 51040110?
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 51040110 from ZenSupply?
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