SEPCO 118R Straight Rod Coupli...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.09
SEPCO 118R Straight Rod Coupling for Threaded Rod, Zinc-Plated Steel

SEPCO 118R Straight Rod Coupling for Threaded Rod, Zinc-Plated Steel

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Model: 120R

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

$1.09
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SEPCO 118R Straight Rod Coupling for Threaded Rod, Zinc-Plated Steel

The SEPCO 118R Straight Rod Coupling is a zinc-plated steel fitting that joins two lengths of threaded rod into one continuous, secure run, available in 1/4-Inch, 3/8-Inch, and 1/2-Inch trade sizes to match the rod diameter on your job. Straight rod couplings like the 118R are common hardware for electricians and installers extending threaded rod used to suspend conduit, cable tray, strut channel, or other support hardware from a structural ceiling or wall. The straight, in-line design keeps rod runs aligned without offset, so the finished support assembly stays plumb and true across every size in the 118R line. The zinc-plated finish helps resist corrosion in indoor installation environments, giving the coupling a longer service life than uncoated steel hardware.

Key Features

  • Trade Size: Offered in 1/4-Inch, 3/8-Inch, and 1/2-Inch versions so you can match the coupling to the threaded rod diameter used in your support run.
  • Durable Steel Construction: Solid steel body provides the strength needed for structural and support applications.
  • Zinc-Plated Finish: Zinc plating helps resist corrosion for reliable long-term indoor performance.
  • Straight Coupling Style: Inline configuration keeps threaded rod runs straight and properly aligned.
  • Industry-Standard Thread: Each trade size uses the standard machine thread for that rod diameter, keeping the 118R compatible with widely available threaded rod stock for easy sourcing and replacement.
  • Tool-Friendly Installation: The compact, straight-through profile threads on quickly with hand tools for fast rod-to-rod connections.

Technical Specifications

  • Finish: Zinc-Plated
  • Trade Size: 1/4-Inch - 1/2-Inch

Typical Applications

  • Conduit and Cable Tray Support Systems
  • Threaded Rod Hanging Assemblies
  • Electrical and Mechanical Support Hardware
  • Strut and Rod Suspension Systems
  • Commercial and Light Industrial Installations
  • MRO and Facility Maintenance Rod Repairs

Why SEPCO?

The SEPCO 118R Straight Rod Coupling delivers dependable zinc-plated steel construction across its full 1/4-Inch to 1/2-Inch size range, for professionals who need secure, reliable threaded rod connections. Its straightforward straight-coupling design and corrosion-resistant finish make it a practical choice for support and suspension applications where a dependable rod-to-rod connection point is essential. Standardized on common threaded rod sizes, the SEPCO 118R is easy to specify, stock, and install alongside other SEPCO support hardware. Choose SEPCO 118R hardware built to perform in demanding installation environments.

Manufacturer Resources

SEPCO Product Catalog

Product Specs

list_batch:
SEP-20260911
Product Type:
Threaded Rod Accessory
Product Finish:
Zinc-Plated
Connection Type:
Threaded
Configuration:
Straight
Department:
Electrical
Product Group:
Hangers, Supports & Fasteners
Product Subgroup:
Hangers, Straps & Supports
Product Material:
Steel

SEPCO 120R – Frequently Asked Questions

1) Which part number do I order for 3/8-inch threaded rod?
The SEPCO 118R straight rod coupling line breaks out by rod size: 118R for 1/4-inch, 120R for 3/8-inch, and 121R for 1/2-inch. Pick the number that matches the rod diameter you are splicing, since the coupling threads directly onto standard rod stock in that size.
2) Will a SEPCO rod coupling work with the threaded rod I already have on site?
Yes, as long as the rod is standard 1/4-inch, 3/8-inch or 1/2-inch threaded rod. Each size of the SEPCO straight rod coupling uses the standard machine thread for that rod diameter, so it mates with commonly stocked rod without adapters. The connection is threaded throughout, so nothing is welded or set-screwed.
3) Can I use a straight rod coupling to extend a rod drop that came up short for a conduit hanger?
That is the normal use. The straight, in-line body joins two lengths of threaded rod into one continuous run with no offset, so the extended drop stays plumb, which matters when it is carrying conduit, cable tray, or strut channel off a ceiling or wall. Thread one rod in from each end until the ends meet inside the body for full engagement.
4) Is a zinc-plated steel rod coupling okay for outdoor or wet locations?
Zinc plating on this steel coupling is aimed at indoor installation environments, where it resists corrosion better than bare steel. For exterior, damp, or corrosive settings, specify hardware rated for that exposure instead of relying on the zinc plate.
5) Can I use a nVent CADDY ERC coupling in place of a SEPCO 118R to splice threaded rod?
Both are threaded rod couplings intended to join two lengths of rod into one continuous run. The nVent CADDY ERC A1B1624 is a threaded rod coupling sold in a 100-piece pack, while the SEPCO 118R is a zinc-plated steel straight coupling available in 1/4-inch, 3/8-inch, and 1/2-inch. Match the coupling to the rod diameter you are splicing, and note the SEPCO 118R zinc plating is intended for indoor installation environments.
6) Do I need any special tools to install a threaded rod coupling?
No. The compact straight-through body threads on with hand tools, so a rod-to-rod splice goes together without cutting, drilling, or a press. Nothing else is required beyond the two rods being joined.
7) Is this the right coupling for standardizing rod splices across a facility?
For a facility crew, the three sizes cover the rod diameters most electrical and mechanical support runs use, 1/4-inch, 3/8-inch and 1/2-inch, all in the same zinc-plated steel body and the same straight configuration. Stocking the three part numbers (118R, 120R, 121R) covers rod repairs and extensions on conduit, tray, and strut suspension without carrying multiple styles.
How fast can I get the SEPCO 120R 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 SEPCO 120R come with a warranty?
Absolutely. The SEPCO 120R 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 SEPCO 120R?
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 SEPCO 120R 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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