You may also like
2-1/2" Compression Coupling
Features
- Concrete tight
- Heavy steel walls
- Zinc plated to prevent corrosion
Manufacturer Resources
Product Specs
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Conduit Fittings
- Product Type:
- Conduit Coupling
Allied Tube & Conduit CK250RKON – Frequently Asked Questions
1) What size and type of conduit does the Allied Tube & Conduit CK250RKON coupling join?
The CK250RKON is a 2-1/2 inch compression coupling, so it joins two runs of 2-1/2 inch conduit end to end. Compression couplings grip the tube wall with a gland nut and ferrule, so no threading of the conduit is needed, just a clean, square cut and a tight nut.
2) Can I use this 2-1/2 inch compression coupling in a concrete pour?
Yes. The CK250RKON is a concrete tight coupling, which is what you need when the conduit run is embedded in poured slab or deck and you can't have wet concrete pushing into the raceway. Tighten the compression nuts fully before the pour.
3) Is this compression coupling corrosion resistant enough for a damp mechanical room or parking structure?
The coupling is zinc plated to resist corrosion and built with heavy steel walls, which covers typical indoor and protected damp locations such as mechanical rooms and covered parking. Zinc plating is a general corrosion coating, not a substitute for a fitting specified for direct burial or chemical exposure.
4) What's the difference between a compression coupling like this and a set screw coupling?
A set screw coupling holds the conduit with screws and is fine for dry, exposed indoor runs. A compression coupling such as the CK250RKON seals against the tube with a nut and ferrule and is the one to use where the fitting must be concrete tight, for example in slab or deck pours. If your drawing calls out concrete tight fittings, set screw won't satisfy it.
5) Do I need a separate ground bushing or jumper when using this steel compression coupling?
The CK250RKON is a steel coupling, and steel compression fittings on EMT are relied on for raceway continuity in a standard installation, so a supplemental bonding jumper is not normally added at the coupling itself. Where your job spec or the inspector calls for bonding at every fitting, add it per the spec.
6) Is the CK250RKON the right part number for standardizing 2-1/2 inch conduit couplings across a facility?
For a single 2-1/2 inch compression coupling, CK250RKON is the Atkore Allied Tube & Conduit part number to put on the requisition. It's one model, no finish or handing options to specify, so repeat orders and multi-site standardization are straightforward.
How fast can I get the Allied Tube & Conduit CK250RKON 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 CK250RKON come with a warranty?
Absolutely. The Allied Tube & Conduit CK250RKON 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 CK250RKON?
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 CK250RKON 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.