Mulberry 40453 Rubber Bushing,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.01
Mulberry 40453 Rubber Bushing, 5/8" (.625) Trade Size

Mulberry 40453 Rubber Bushing, 5/8" (.625) Trade Size

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Model: 40453

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

$1.01
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Mulberry 40453 Rubber Bushing, 5/8" (.625) Trade Size

The Mulberry 40453 Rubber Bushing is sized for a 5/8" (.625) trade opening and is built to protect conductors as they pass through conduit and enclosure knockouts. This molded rubber bushing creates a smooth, insulated seal at the knockout edge, helping guard wire insulation against abrasion and chafing during and after installation. Mulberry designs this bushing for quick, dependable use in everyday commercial and industrial electrical work where knockout protection is required.

Key Features

  • Trade Size: Sized for a 5/8" (.625) opening, matching standard conduit and enclosure knockouts.
  • Durable Rubber Construction: Molded rubber body offers flexibility and resists cracking or splitting at sharp metal edges.
  • Insulating Protection: Forms a protective, insulated barrier between conductors and knockout edges to reduce the risk of wire damage over time.
  • Low-Profile Fit: Compact bushing profile seats cleanly into the knockout without adding unnecessary bulk to the enclosure or fitting.
  • Simple Field Installation: Designed for straightforward push-in style installation, saving time on the job.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Conduit and Raceway Knockout Protection
  • Electrical Panel and Enclosure Wiring
  • Junction Box and Panelboard Installations
  • Commercial and Industrial Electrical Installations
  • New Construction and Retrofit Wiring Projects

Why Mulberry?

Mulberry engineers rubber bushings like the 40453 to give electricians a reliable, insulated fit at conduit and enclosure knockouts, helping protect conductor insulation from abrasion at metal edges. Selecting a properly matched 5/8" (.625) trade size bushing supports a cleaner, safer wiring installation. Mulberry's electrical components are built for dependable, code-conscious performance across common commercial and industrial applications.

Manufacturer Resources

Mulberry Full Line Catalog

Product Specs

list_batch:
MUL-20260919
Product Type:
Conduit Bushing
Department:
Electrical
Product Subgroup:
Conduit Fittings
Product Material:
Rubber
Product Size:
5/8" (.625)
Product Group:
Conduit & Raceway

Mulberry 40453 – Frequently Asked Questions

1) What size knockout does the Mulberry 40453 rubber bushing fit?
The Mulberry 40453 is sized for a 5/8 inch (.625) trade opening, which matches the standard knockout used for 1/2 inch trade size conduit runs in panels, junction boxes and enclosures. If your knockout is a different trade size, you need the matching bushing for that opening rather than forcing this one in.
2) Will a rubber bushing protect THHN conductors pulled through a sheet metal enclosure edge?
That is what it is for. The 40453 forms an insulated barrier between the conductors and the raw knockout edge so the wire jacket is not abraded during the pull or chafed later by vibration. It is rubber, so it does not present a cut edge of its own.
3) Is the Greenlee 3037AV bushing an alternative to the Mulberry 40453 rubber bushing for protecting conductors at a knockout?
No. The Greenlee 3037AV is a replacement bushing for the 730EBB cable bender, so it is a service part for a bending tool rather than a wiring component. The Mulberry 40453 is a molded rubber bushing sized for a 5/8 inch (.625) trade opening that seats in conduit and enclosure knockouts to insulate conductors against the metal edge. If the job is knockout protection at a panel, junction box, or raceway, the 40453 is the part that fits that role; the 3037AV belongs with the bender it services.
4) Do I need a rubber bushing or a plastic insulating bushing at a panel knockout?
A molded rubber bushing like the 40453 flexes into the knockout and seats against the metal edge, so it stays put in a push-in installation and resists cracking or splitting where a rigid part can chip. Rigid threaded insulating bushings are the choice when the fitting has threads to engage. For an unthreaded knockout edge that conductors pass over, the rubber grommet-style bushing is the right part.
5) What part number do I order for the Mulberry 5/8 inch rubber bushing?
Order Mulberry model 40453. It is a single model, 5/8 inch (.625) trade size, with no finish or material options to specify.
6) Can I use the 40453 bushing on a retrofit where the old knockout has no fitting in it?
Yes, an open 5/8 inch knockout with wire running through it is the common case for this bushing. It pushes into the opening and seats at the edge, so you do not need to pull the panel apart or add a threaded fitting to get insulated protection on an existing run.
7) Will a rubber bushing add bulk inside a crowded panelboard?
Very little. The 40453 has a compact, low profile body that seats into the knockout rather than standing off it, so it does not eat gutter space in a panelboard or junction box where wire bending room is already tight.
How fast can I get the Mulberry 40453 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 40453 come with a warranty?
Absolutely. The Mulberry 40453 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 40453?
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 40453 from ZenSupply?
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