Topaz Lighting KO Steel Condui...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.28
Topaz Lighting KO Steel Conduit Knockout Seal

Topaz Lighting KO Steel Conduit Knockout Seal

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Model: KO51

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

$0.28
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Topaz Lighting KO Steel Conduit Knockout Seal

The Topaz Lighting KO Steel Conduit Knockout Seal is engineered to close unused knockout openings in electrical boxes, panelboards, and enclosures throughout conduit and raceway systems. Built from durable steel, this knockout seal is available in trade sizes ranging from 1/2" to 2" to match standard knockout openings across commercial, industrial, and residential wiring projects. By sealing off unused openings, it helps keep electrical enclosures free of debris, moisture, and pests while supporting a clean, code-compliant installation. As part of Topaz Lighting's conduit and raceway product line, this steel knockout seal integrates seamlessly with standard electrical boxes and panelboards found in commercial, industrial, and residential wiring projects.

Key Features

  • Trade Size Range: Available in 1/2", 3/4", 1", 1-1/4", 1-1/2", and 2" sizes to fit standard knockout openings in boxes and enclosures.
  • Durable Steel Construction: Manufactured from steel for strength, rigidity, and long-lasting performance in demanding electrical environments.
  • Knockout Seal Design: Closes unused knockout openings to help maintain the integrity and cleanliness of electrical enclosures.
  • Conduit & Raceway Compatible: Designed for use within conduit and raceway electrical systems found in commercial, industrial, and residential wiring.
  • Straightforward Installation: Provides an easy, low-maintenance solution for sealing unused knockouts in boxes and enclosures without special tools.
  • Versatile Use: Suitable for a wide variety of conduit and raceway configurations across commercial, industrial, and residential settings.
  • Enclosure Protection: Helps shield electrical enclosures from dust, debris, and unwanted intrusion through unused knockout points.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Conduit and Raceway Systems
  • Electrical Panelboards and Enclosures
  • Commercial and Industrial Electrical Installations
  • Renovation and New Construction Projects
  • Junction Box and Cabinet Sealing
  • General-Purpose Electrical Maintenance

Why Topaz Lighting?

Topaz Lighting builds its steel knockout seal for dependable, code-compliant performance in electrical enclosures across conduit and raceway systems. The steel construction supports long-term durability in commercial and industrial environments, while the simple seal design helps electrical professionals maintain clean, secure installations across the full 1/2" to 2" size range. Choose Topaz Lighting for a straightforward, reliable solution to unused knockout openings, backed by a product line purpose-built for the conduit and raceway electrical category.

Product Specs

Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Fittings
Product Type:
Conduit Plug
Product Material:
Steel
Product Size:
1/2" - 2"

Topaz Lighting KO51 – Frequently Asked Questions

1) What size knockout seal do I need for a 1/2 inch conduit knockout?
Match the seal to the trade size of the opening, not the conduit you removed. The Topaz KO steel knockout seals run 1/2", 3/4", 1", 1-1/4", 1-1/2", and 2", ordered as KO50 through KO55 in that order. So a 1/2" knockout takes the KO50.
2) I have a 1-1/4 inch open knockout in a commercial panel. Which Topaz part number is that?
That is the KO53. The 1-1/4" size sits mid-range in the Topaz steel knockout seal line, between the KO52 at 1" and the KO54 at 1-1/2".
3) Will a steel knockout seal work in an aluminum or PVC enclosure?
The Topaz KO seal is steel, so it suits steel boxes, panelboards, and enclosures where it will not sit against dissimilar metal. In an aluminum enclosure or a wet location, electricians generally reach for a matching-material or gasketed seal instead to avoid galvanic issues. Sizing is the same either way: the seal matches the trade size of the knockout.
4) Why bother sealing an unused knockout in a panelboard?
An open knockout leaves the enclosure open to dust, debris, moisture, and pests, and inspectors will flag it. The Topaz steel KO seal closes the opening so the enclosure stays intact, which is the usual fix during renovation work, junction box and cabinet sealing, and general electrical maintenance.
5) Do I need special tools to install a Topaz KO knockout seal?
No. The steel KO seal drops into the open knockout and secures without special tooling, which is why it is a common MRO item for closing up a panel after a circuit is pulled or a fitting is relocated.
6) Can I standardize on one box of knockout seals across a whole facility?
Most maintenance carts carry the full spread rather than a single size, because panel knockouts run 1/2" through 2" depending on the feeder. Topaz covers that entire span with six steel seals, KO50, KO51, KO52, KO53, KO54, and KO55, so a facility can stock one brand and one material across every enclosure it owns.
How fast can I get the Topaz Lighting KO51 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 Topaz Lighting KO51 come with a warranty?
Absolutely. The Topaz Lighting KO51 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 Topaz Lighting KO51?
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 Topaz Lighting KO51 from ZenSupply?
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