Thomas & Betts 1453 1" Non-Met...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$6.76
Thomas & Betts 1453 1" Non-Metallic Locking Knockout Plug, Rigid/IMC Conduit

Thomas & Betts 1453 1" Non-Metallic Locking Knockout Plug, Rigid/IMC Conduit

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Model: 1453

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

$6.76
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Thomas & Betts 1453 1" Non-Metallic Locking Knockout Plug, Rigid/IMC Conduit

The Thomas & Betts 1453 is a 1" non-metallic locking plug engineered to seal unused knockout openings on Rigid and IMC conduit systems and electrical enclosures. Molded from durable non-metallic material, this locking plug threads into standard 1" knockout openings to close off unused ports, helping keep panels, junction boxes, and enclosures clean, organized, and code-ready. Because the plug body is non-metallic, it resists corrosion and will not conduct electricity, giving installers a dielectric alternative to metal knockout seals wherever a solid, non-conductive closure is preferred. Sized specifically for 1" trade-size openings, the 1453 is a straightforward drop-in solution for electricians and contractors working on Rigid and IMC conduit systems in commercial and industrial settings.

Key Features

  • Trade Size: 1" sizing fits standard 1" knockout openings on Rigid and IMC conduit bodies, junction boxes, and enclosures for a direct, correctly sized fit without adapters.
  • Non-Metallic Construction: Molded from durable non-metallic material, the 1453 resists corrosion and will not conduct electricity, offering a practical alternative to metallic knockout seals where a non-conductive plug is preferred.
  • Locking Plug Design: The locking design seats into the knockout opening and holds in place once installed, helping keep the opening sealed against dust, debris, and moisture intrusion at the enclosure.
  • Conduit System Compatibility: Engineered for use with Rigid and IMC conduit systems, the 1453 integrates cleanly with metallic raceway installations while itself remaining non-metallic.
  • Lightweight, Low-Maintenance Material: The non-metallic body is lighter than comparable metal knockout plugs and does not require plating, painting, or coating to resist corrosion.
  • Simple Installation: The plug installs directly into the 1" knockout opening without special tools, helping speed up panel, box, and enclosure finishing work.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Sealing Unused Knockout Openings on Conduit Bodies, Boxes, and Enclosures
  • Rigid Conduit Installations in Commercial and Industrial Facilities
  • IMC (Intermediate Metal Conduit) Installations
  • Electrical Panelboards, Junction Boxes, and Pull Boxes
  • New Construction and Electrical Retrofit Projects
  • General Conduit System Maintenance and Finishing Work

Why Thomas & Betts?

Thomas & Betts designs conduit fittings and accessories, including the 1453 non-metallic locking plug, to give electrical contractors a dependable way to close out unused knockouts on Rigid and IMC conduit systems. The non-metallic, corrosion-resistant construction supports long-term performance without introducing an additional conductive metal component into the installation. Choosing Thomas & Betts for conduit system accessories helps ensure a consistent, correctly sized fit and dependable seal across your electrical installation.

Manufacturer Resources

Spec Sheet

Product Specs

Department:
Electrical
Product Type:
Conduit Plug
Product Subgroup:
Conduit Fittings
Product Material:
Thermoplastic
Application:
To Plug Unused Knockout Openings In a Box or Enclosure
Product Group:
Conduit & Raceway

Thomas & Betts 1453 – Frequently Asked Questions

1) What is the Thomas & Betts 1453 knockout plug used for?
It closes out an unused knockout opening in a box or enclosure. The 1453 threads into the opening and seats so the port stays sealed against dust, debris, and moisture, which is the finishing step on panelboards, junction boxes, and pull boxes once the raceway runs are terminated.
2) Is the Thomas & Betts 1453 plug metal or plastic, and will it corrode in a damp enclosure?
The body is thermoplastic, not metal. That means it will not rust or need plating, painting, or coating to hold up, and it adds no conductive metal part to the enclosure. If your spec calls for a metallic seal to maintain continuity or a metal-only assembly, this is not the right plug.
3) Can I use a non-metallic plug on a rigid or IMC conduit system?
Yes. The 1453 is intended for use with Rigid and IMC conduit systems and enclosures even though the plug itself is non-metallic, so it drops into metallic raceway work without issue. The plug is not a bonding component, so where a knockout closure has to carry continuity, use a metallic seal instead.
4) Does the Thomas & Betts 1453 plug need tools or a locknut to install?
No special tools. The locking plug installs directly into the knockout opening and holds itself in place once seated, so there is nothing extra to thread on from inside the box. That matters when you are plugging openings in a crowded panel where you cannot get a hand behind the wall.
5) What part numbers does the Thomas & Betts non-metallic locking knockout plug come in?
Two: model 1453 and model 1456. They differ by bushing diameter, 3/8 inch on the 1453 and 7/16 inch on the 1456, so order against the opening you are closing.
6) Do I need an adapter or reducing washer with the Thomas & Betts 1453 plug?
No. The plug is sized to thread straight into the matching trade-size knockout, so there are no adapters, reducers, or sealing washers to buy with it. Match the plug size to the hole and that is the whole assembly.
7) Is a plastic knockout plug acceptable for commercial and industrial panel work?
It is made for it. Thomas & Betts lists the 1453 for Rigid and IMC installations in commercial and industrial facilities, panelboards, junction boxes, pull boxes, and both new construction and retrofit work. The deciding factor is whether your job requires a conductive metal closure at that opening; if it does not, the non-metallic plug is the lighter, corrosion-free option.
How fast can I get the Thomas & Betts 1453 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 Thomas & Betts 1453 come with a warranty?
Absolutely. The Thomas & Betts 1453 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 Thomas & Betts 1453?
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 Thomas & Betts 1453 from ZenSupply?
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