Mulberry 40018 Reducing Washer...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.23
Image coming soon

Mulberry 40018 Reducing Washer

(No reviews yet) Write a Review

Model: MUL40007

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

$0.23
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Mulberry 40018 Reducing Washer, 2" x 1-1/4"

The Mulberry 40018 Reducing Washer is engineered to adapt a 2" conduit knockout down to 1-1/4", giving electricians a fast, secure way to fit smaller conduit, connectors, or fittings into a larger pre-punched knockout on panelboards, enclosures, meter sockets, and junction boxes. Rather than redrilling, oversizing, or replacing an existing knockout, installers can drop this Mulberry reducing washer into place to close the size gap and maintain a clean, properly seated transition between mismatched trade sizes. As part of Mulberry's broader line of conduit fittings and electrical hardware, model 40018 is built for straightforward field use on commercial, industrial, and residential projects wherever a 2" to 1-1/4" size reduction is needed at the panel or enclosure. Reducing washers like the 40018 are a common sight during rough-in and service upgrade work, where an existing 2" knockout must accommodate a smaller 1-1/4" conduit run without modifying or replacing the enclosure itself.

Key Features

  • Trade Size: Reduces a 2" conduit knockout or opening down to 1-1/4", matching smaller conduit, connectors, or fittings to a larger enclosure opening.
  • Reducing Washer Design: Eliminates the need to redrill, ream, or oversize a knockout when a smaller conduit size is being landed in a larger opening.
  • Model 40018: Identified by Mulberry model number 40018 for accurate specification, cross-reference, and reordering.
  • Mulberry Manufactured: Sourced from Mulberry's line of conduit fittings and accessories used across a wide range of electrical distribution equipment.
  • Field-Ready Fit: A simple, one-piece washer that seats into the larger 2" knockout to accept 1-1/4" conduit or fittings without special tools, speeding up rough-in and service work.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Panelboard and Load Center Knockout Adaptation
  • Electrical Enclosure and Junction Box Installations
  • Conduit Size Transitions in Commercial and Industrial Wiring
  • Service Entrance and Distribution Equipment Assembly
  • Renovation, Retrofit, and New Construction Electrical Work

Why Mulberry?

Mulberry produces a broad catalog of conduit fittings, washers, and electrical hardware relied on by professional electricians for dependable, application-specific connections in panelboards, enclosures, and raceway systems. The 40018 reducing washer reflects that same practical, job-ready approach—a simple component designed to solve a common sizing mismatch in the field without improvisation or extra fabrication. For electricians standardizing on a single supplier for conduit fittings and hardware, Mulberry parts like the 40018 offer a straightforward way to keep panel and enclosure knockouts properly matched to the conduit being installed. Choose Mulberry conduit fittings from ZenSupply for accurate, ready-to-install electrical hardware on your next project.

Manufacturer Resources

Product Specs

Product Type:
Reducing Washer
Department:
Electrical
Product Subgroup:
Shop by Brand
list_batch:
MUL-20260919

Mulberry MUL40007 – Frequently Asked Questions

1) What size reductions do Mulberry reducing washers come in?
Mulberry offers ten reductions across this washer line: 1 inch to 1/2 inch (40006), 1 inch to 3/4 inch (40007), 1-1/4 inch to 1/2 inch (40008), 1-1/4 inch to 3/4 inch (40009), 1-1/2 inch to 1/2 inch (40011), 1-1/2 inch to 3/4 inch (40012), 1-1/2 inch to 1 inch (40013), 2 inch to 1 inch (40017), 2 inch to 1-1/4 inch (40018), and 3 inch to 2-1/2 inch (40032). The first number is the knockout you already have, the second is the conduit or connector you are landing in it.
2) I have a 2 inch knockout in a panel and I'm running 1-1/4 inch conduit. Which Mulberry washer do I order?
Model 40018. It takes a 2 inch conduit knockout down to 1-1/4 inch so the smaller connector seats properly in the larger pre-punched opening, no redrilling or reaming of the enclosure. If the run is actually 1 inch rather than 1-1/4, order the 40017 instead, which is the 2 inch to 1 inch version.
3) Can I use a reducing washer instead of drilling out or punching a new hole in my panelboard?
That is exactly the point of it. Mulberry's reducing washers close the gap between a factory knockout and a smaller conduit so you leave the enclosure intact. Redrilling or reaming a panelboard, load center, meter socket, or junction box opens the cabinet up to burrs, paint damage, and an out-of-round hole the connector will not seat in. The washer drops in and gives a properly seated transition between the two trade sizes without special tools.
4) Do I need two reducing washers per knockout, or just one?
Mulberry lists the 40018 as a one-piece washer that seats into the larger knockout to accept the smaller conduit or fitting. Common field practice on a sheet metal enclosure is a washer on each side of the wall, one under the locknut and one under the connector shoulder, so count your order by opening, not by piece.
5) Will a Mulberry reducing washer work for a 3 inch knockout?
Only down to 2-1/2 inch. Model 40032 is the single large-size step in the Mulberry line, 3 inch knockout to 2-1/2 inch conduit. There is no 3 inch to 2 inch or smaller washer in the range, so a bigger jump at a 3 inch opening needs a different approach than this part.
6) What's the biggest size drop I can make with one of these washers?
Three trade sizes, on the 40011, which reduces a 1-1/2 inch knockout to 1/2 inch. The 40008 does a similar wide jump, 1-1/4 inch down to 1/2 inch. On a 2 inch knockout the smallest Mulberry goes is 1 inch (40017), so landing 1/2 inch conduit in a 2 inch opening is not covered by a single washer from this line.
7) Are these reducing washers for new construction or retrofit work?
Both. Mulberry calls out rough-in on new commercial, industrial, and residential jobs as well as renovation, retrofit, and service upgrade work, where an existing 2 inch knockout has to take a smaller conduit run without replacing the enclosure. Service entrance and distribution equipment assembly is another common spot for them.
8) I want to stock reducing washers on the truck. Which Mulberry sizes cover the most common panel work?
The 1/2 and 3/4 inch landings carry most branch circuit work: 40006 (1 to 1/2), 40007 (1 to 3/4), 40008 (1-1/4 to 1/2), 40009 (1-1/4 to 3/4), 40011 (1-1/2 to 1/2), and 40012 (1-1/2 to 3/4). For feeder and service sizes add 40013 (1-1/2 to 1), 40017 (2 to 1), and 40018 (2 to 1-1/4). Each is identified by its Mulberry model number for cross-reference and reordering, so a standardized part list stays clean.
How fast can I get the Mulberry MUL40007 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 Mulberry MUL40007 come with a warranty?
Absolutely. The Mulberry MUL40007 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 Mulberry MUL40007?
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 Mulberry MUL40007 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.
!