Thomas & Betts Threadless Cond...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$40.60
Thomas & Betts Threadless Conduit Coupling

Thomas & Betts Threadless Conduit Coupling

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Model: TB8220

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

$40.60
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Thomas & Betts 8220 3/4" Threadless Conduit Coupling

This Thomas & Betts 3/4" threadless coupling is built to join two lengths of conduit into a single continuous run without the need for field threading. As a threadless fitting, it speeds up installation for electricians working on commercial, industrial, and residential electrical raceway systems where standard 3/4" trade size conduit is used. By eliminating the thread-cutting step required by traditional threaded couplings, this fitting helps reduce labor time and tool requirements on the jobsite while still providing a secure mechanical connection between conduit sections. It is a practical, no-frills solution for extending or repairing conduit runs during new construction, renovation, and maintenance work, and its 3/4" trade size makes it a common stock item for electrical contractors who need to keep standard conduit runs moving without interruption.

Key Features

  • Trade Size: 3/4" coupling sized to match standard 3/4" trade size conduit for straightforward compatibility with existing raceway runs.
  • Threadless Design: Connects two conduit sections without requiring the ends to be field-threaded, cutting down on installation steps and tool requirements.
  • Coupling Configuration: A single fitting that joins two lengths of conduit end-to-end, maintaining a continuous, protected raceway for conductors.
  • Simplified Installation: The threadless connection method allows electricians to complete conduit runs more quickly than with traditional threaded hardware.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Commercial and Industrial Electrical Installations
  • Conduit and Raceway Systems
  • Extending or Repairing 3/4" Conduit Runs
  • New Construction Electrical Rough-In
  • Renovation and Retrofit Electrical Work

Why Thomas & Betts?

Thomas & Betts is a recognized name in electrical distribution products, supplying fittings and components that electrical contractors rely on for dependable conduit connections. This threadless coupling reflects the brand's focus on practical, functional hardware designed to help installers complete conduit runs efficiently and correctly the first time. Choosing Thomas & Betts fittings gives electricians a straightforward, no-thread solution built for the demands of everyday conduit installation work, backed by a brand that electrical professionals recognize on the jobsite.

Manufacturer Resources

Product Specs

Department:
Electrical
Product Type:
Conduit Coupling
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Fittings
Product Material:
Malleable Iron

Thomas & Betts TB8220 – Frequently Asked Questions

1) What trade sizes does the Thomas & Betts threadless conduit coupling come in?
Five trade sizes: 3/4 inch (model 8220), 1-1/4 inch (8420), 2-1/2 inch (8720), 3-1/2 inch (8850) and 4 inch (8970). Order by the trade size of the conduit you are joining, not by the conduit's outside diameter.
2) Do I have to thread the conduit ends to use this Thomas & Betts coupling?
No. It is a threadless coupling, so it joins two conduit sections without field-cutting threads on the ends. That takes the threader out of the job and lets you cut, ream and couple with hand tools.
3) Can I use a threadless coupling to repair a conduit run that is already installed?
Yes, that is one of its main uses. Because neither end needs threading, you can cut out a damaged section of an existing run and couple new conduit back in place where a threaded coupling would require you to spin the pipe or rethread it. Match the coupling to the trade size of the run, 3/4 inch through 4 inch.
4) Threadless coupling or standard threaded coupling for a new conduit run?
A threaded coupling assumes you can rotate one length of conduit into it, which is fine on open rough-in where you are working from factory-threaded ends. The threadless version earns its place when you have cut a length in the field, when you cannot spin the pipe, or when you do not want a threader on site. Functionally both do the same thing: join two lengths end to end into one continuous raceway for the conductors.
5) Will a 3/4 inch Thomas & Betts 8220 coupling fit 3/4 inch EMT and 3/4 inch rigid the same way?
Trade size is what you order to. The 8220 is sized for 3/4 inch trade size conduit, and trade size is the common sizing convention across conduit types, so a 3/4 inch fitting pairs with 3/4 inch conduit regardless of what the run measures on the outside. Confirm the conduit type your specification calls for, since fittings are listed for specific raceway types.
6) I am stocking a service truck for commercial electrical work. Which of these coupling sizes cover the most common runs?
3/4 inch (8220) and 1-1/4 inch (8420) are the branch-circuit and feeder sizes you will reach for most on commercial rough-in and retrofit. The 2-1/2 inch (8720), 3-1/2 inch (8850) and 4 inch (8970) belong with service and large feeder work, so most MRO carts carry those only on the job that calls for them.
7) Does one of these couplings join two pieces of conduit, or do I need two per joint?
One coupling per joint. Each fitting takes a length of conduit at either end and makes up a single splice, so count one per cut you are joining, plus spares for the run.
How fast can I get the Thomas & Betts TB8220 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 Thomas & Betts TB8220 come with a warranty?
Absolutely. The Thomas & Betts TB8220 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 Thomas & Betts TB8220?
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
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