Crouse-Hinds Steel Knockout Sn...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.94
$0.92
Eaton Crouse-Hinds Knockout Snap-In Blank - Rigid/IMC, Steel

Crouse-Hinds Steel Knockout Snap-In Blank for Rigid/IMC Conduit Systems

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Model: 339

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

$0.94
$0.92
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Crouse-Hinds Steel Knockout Snap-In Blank for Rigid/IMC Conduit Systems

Professional conduit system sealing solution

The Crouse-Hinds Steel Knockout Snap-In Blank provides reliable sealing for unused knockout openings in rigid and IMC conduit systems. This steel construction blank ensures secure closure of electrical enclosures in ordinary/non-hazardous locations, maintaining system integrity and code compliance with trusted Crouse-Hinds quality.

Professional Features & Benefits

  • Steel Construction: Durable material provides long-lasting performance and corrosion resistance for reliable service life
  • Rigid/IMC Compatibility: Designed specifically for rigid and IMC conduit systems ensuring proper fit and secure installation
  • Snap-In Design: Easy installation without additional hardware or tools for efficient field installation
  • Ordinary Location Rating: Suitable for non-hazardous environments providing versatile application flexibility
  • Lightweight Design: At 0.05 LB, minimizes additional load on electrical enclosures while maintaining structural integrity

Technical Specifications

  • Area Classification: Ordinary/Non-Hazardous Locations
  • Conduit Type: Rigid/IMC
  • Product Material: Steel
  • Product Weight: .05 LB

Professional Applications

  • Commercial Electrical Installations
  • Industrial Conduit Systems
  • Residential Electrical Projects
  • Maintenance and Retrofit Applications
  • Professional Electrical Contracting
  • Code Compliance Projects

Why Choose Crouse-Hinds Quality?

Crouse-Hinds delivers proven reliability in electrical system components with steel construction ensuring durability and long-term performance. The lightweight design and snap-in installation provide professional-grade solutions for ordinary location applications.

Manufacturer Resources

Product Specs

Area Classification:
Ordinary/Non-Hazardous Locations
Conduit Type:
Rigid/IMC
Product Material:
Steel
Product Weight:
.05 LB
Product Depth:
0.69 in
Product Grips:
Plastisol
Department:
Electrical
Product Type:
Electrical Box Accessory
Product Subgroup:
Electrical

Crouse-Hinds 339 – Frequently Asked Questions

1) What trade sizes does the Crouse-Hinds steel knockout snap-in blank come in?
Three trade sizes: 1/2 inch (part 335), 1 inch (part 337), and 1-1/2 inch (part 339). Order by the trade size of the knockout you are closing, not by the conduit you removed.
2) Can I use a snap-in knockout blank in a hazardous or classified area?
No. The Crouse-Hinds steel snap-in blank is rated for ordinary/non-hazardous locations only. For a Class I or Class II classified area you need a threaded close-up plug rated for that classification, not a snap-in seal.
3) Is a steel knockout blank OK for closing unused openings in a rigid or IMC conduit installation?
Yes, that is exactly what it is for. It is specified for rigid and IMC systems and closes unused knockouts in boxes and enclosures so the enclosure stays sealed. Body is steel, and the gripping element is Plastisol.
4) Do I need a locknut or any hardware to install a knockout snap-in blank?
No extra hardware. The blank snaps into the open knockout and holds itself, so it installs from one side with no locknut and no threading. That is the practical difference from a threaded blank plug, which needs access to both sides of the enclosure wall.
5) How much clearance do I need behind the box wall for a snap-in blank?
Allow about 0.69 inch of depth for the blank. On a shallow box packed with conductors, check that clearance before you order, because the snap-in body sits into the enclosure rather than flush against the wall.
6) I have a mix of 1/2, 1 and 1-1/2 inch open knockouts across a building. Can I standardize on one part?
No single blank covers all three. Knockout blanks are size specific, so you need part 335 for the 1/2 inch openings, 337 for the 1 inch, and 339 for the 1-1/2 inch. For fleet or MRO stocking, keep all three on the shelf rather than trying to make one size work.
How fast can I get the Crouse-Hinds 339 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 Crouse-Hinds 339 come with a warranty?
Absolutely. The Crouse-Hinds 339 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 Crouse-Hinds 339?
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 Crouse-Hinds 339 from ZenSupply?
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