Atkore Allied Tube & Conduit C...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$79.80
$32.79
Atkore Allied Tube & Conduit CK400RKON 4" Compression Coupling

Atkore Allied Tube & Conduit CK400RKON 4" Compression Coupling

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Model: CK400RKON

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

$79.80
$32.79
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4" Compression Coupling

  • Features

    • Concrete tight
    • Zinc plated to prevent corrosion
    • Heavy steel walls

Manufacturer Resources

Product Specs

Department:
Electrical

Allied Tube & Conduit CK400RKON – Frequently Asked Questions

1) Is the Allied Tube & Conduit CK400RKON coupling suitable for pouring in concrete?
Yes. The CK400RKON 4 inch compression coupling is concrete tight, so it can be used in poured concrete slabs and walls where the fitting has to keep wet concrete out of the raceway. The body is zinc plated to resist corrosion and uses heavy steel walls to take the load of a pour.
2) What size conduit does the CK400RKON compression coupling join?
It is a 4 inch coupling, used to join two runs of 4 inch conduit end to end. Both ends are compression style, so the connection is made by tightening the gland nuts down on the tubing rather than by threading or setscrews.
3) Compression coupling or setscrew coupling for a 4 inch run?
Compression is the one to use when the raceway has to keep moisture or wet concrete out. The CK400RKON is concrete tight, which a setscrew coupling is not. Setscrew fittings are the cheaper, faster choice for dry indoor work where nothing is being poured around them, but they should not be buried in a slab.
4) Will the CK400RKON coupling corrode in a damp mechanical room or parking structure?
The coupling is zinc plated specifically to resist corrosion, which is what makes it workable in damp interior spaces and in concrete. For direct burial or a genuinely wet, chemically aggressive exterior location, a fitting rated for that service is the better call.
5) What is the manufacturer part number for the Allied Tube & Conduit 4 inch compression coupling?
Order it as CK400RKON from Atkore Allied Tube and Conduit. That is the full manufacturer part number for the 4 inch compression coupling, and it is the number to quote when matching fittings already installed on a job.
How fast can I get the Allied Tube & Conduit CK400RKON 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 Allied Tube & Conduit CK400RKON come with a warranty?
Absolutely. The Allied Tube & Conduit CK400RKON 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 Allied Tube & Conduit CK400RKON?
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 Allied Tube & Conduit CK400RKON from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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