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Crouse-Hinds Steel Knockout Snap-In Blank for Rigid/IMC Conduit Systems
Model: CRS-RMC-KOB-ST
Crouse-Hinds Steel Knockout Snap-In Blank for Rigid/IMC Conduit SystemsProfessional conduit system sealing solutionThe Crouse-Hinds Steel Knockout Snap-In Blank provides reliable sealing for unused...
Crouse-Hinds
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$0.94
$0.92
Crouse-Hinds 336 Rigid/IMC Knockout Snap-In Blank, Steel
The Crouse-Hinds 336 Rigid/IMC Knockout Snap-In Blank is a steel closure designed to seal unused knockout openings in Rigid and IMC conduit enclosures, panels, and boxes. Built from durable steel for long-term strength and a secure, snap-in fit, this knockout blank is available across a range of trade sizes to match common enclosure knockout openings, including 3/4", 1-1/4", and 2". Electricians and contractors rely on this simple, effective solution to maintain a clean, code-compliant enclosure by closing out openings that are not in use, helping protect the interior of panels and boxes from dust, debris, and unintended access.
Key Features
- Trade Size Range: Available in 3/4", 1-1/4", and 2" sizes to fit standard Rigid/IMC knockout openings.
- Durable Construction: Manufactured from steel for strength and long-lasting performance in electrical enclosures.
- Snap-In Design: Quick, tool-free installation into the knockout opening for a secure, flush fit.
- Rigid/IMC Compatibility: Sized to match Rigid and IMC conduit knockout dimensions commonly found in panels and enclosures.
- Enclosure Protection: Closes unused knockouts to help keep enclosure interiors free of dust and debris and maintain a finished appearance.
Technical Specifications
- Product Type: Knockout Snap-In Blank
- Material: Steel
- Trade Sizes: 3/4", 1-1/4", 2"
- Configuration: Snap-In Fit
Typical Applications
- Sealing Unused Knockouts in Electrical Panels and Enclosures
- Rigid and IMC Conduit System Installations
- Commercial and Industrial Electrical Wiring Projects
- New Construction and Enclosure Retrofits
Why Crouse-Hinds?
Crouse-Hinds steel knockout blanks are built for reliable, long-term performance in electrical enclosures, offering a straightforward snap-in fit that saves installation time. Their steel construction provides the strength needed to stay securely in place, supporting a clean, professional finish for electrical panel and conduit work.
Manufacturer Resources
Product Specs
- list_batch:
- CRS-20260917
- Department:
- Electrical
- Product Subgroup:
- Enclosure Accessories
- Product Type:
- Knockout Plug
- Product Material:
- Steel
- Product Group:
- Boxes & Enclosures
Crouse-Hinds CRS336 – Frequently Asked Questions
1) What trade sizes does the Crouse-Hinds 336 knockout snap-in blank come in?
Three trade sizes cover the Crouse-Hinds 336 steel snap-in blank family: 3/4 inch is part number 336, 1-1/4 inch is 338, and 2 inch is 340. Order by the knockout opening you are closing, not by the conduit you were going to run.
2) Do I need a tool or a locknut to install a Crouse-Hinds knockout blank?
No. The 336 series is a snap-in design, so it presses into the knockout opening by hand for a flush fit with no locknut, sealing ring or threading involved. That is the main difference from a threaded knockout plug, which has to be screwed into a threaded hub.
3) Is a steel snap-in blank better than a plastic knockout seal for a panel?
The Crouse-Hinds 336 is steel, which keeps it from deforming or backing out of the opening over time the way a lighter plastic seal can, and it matches the metal of a steel panel or enclosure. For dry indoor panels where you only need to keep dust and debris out and close off access, either type does the job; steel is the choice when the enclosure sees handling, vibration, or an inspector who wants the closure to match the enclosure.
4) Can I use these to close unused knockouts in a panelboard during a retrofit?
That is exactly the use case. The 336, 338 and 340 blanks close out knockouts that were punched but never used, in both new construction and enclosure retrofits, keeping the interior of the panel or box free of dust and debris and closing off unintended access. Match the blank to the opening size you are left with after the conduit runs are set.
5) How do I identify which size snap-in blank I need for a knockout already in the box?
Knockouts in panels and boxes are named by conduit trade size, not by the measured hole diameter, so a 3/4 inch knockout takes the 336, a 1-1/4 inch takes the 338, and a 2 inch takes the 340. If the enclosure schedule or the punch label lists the trade size, order to that number.
6) Are the Crouse-Hinds 336 blanks suitable for Rigid and IMC conduit systems?
Yes, they are dimensioned for the knockout openings used with Rigid and intermediate metal conduit, which is where the trade sizing comes from. The blank itself does not connect to conduit, it closes the hole the conduit would have entered through.
How fast can I get the Crouse-Hinds CRS336 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 CRS336 come with a warranty?
Absolutely. The Crouse-Hinds CRS336 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 CRS336?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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installation tips, and troubleshooting. Contact Us
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