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Rod Coupling 3/8-16 X 1-3/4 Hx St-zn (Jar 50)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Hangers, Supports & Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Hex Bolts & Nuts
- Product Type:
- Rod Coupling
Metallics RCTL28 – Frequently Asked Questions
1) What thread size does the Metallics RCTL28 rod coupling take?
The RCTL28 coupling is threaded 3/8-16, so it joins standard 3/8 inch threaded rod with 16 threads per inch (UNC). It will not accept 1/2-13 or 1/4-20 rod, so match the rod you have in the ceiling before ordering.
2) Is this rod coupling steel or stainless, and is it coated for damp locations?
Metallics RCTL28 is zinc plated steel, not stainless. Zinc plating suits dry and normally damp indoor runs. For wet, corrosive, or exterior work, specify a stainless or hot dip galvanized coupling instead.
3) Why use a hex rod coupling instead of a standard round coupling nut?
The hex profile on the RCTL28 gives a wrench flat, so you can back up the coupling while threading the second rod section in, rather than fighting it by hand overhead. That matters on long trapeze and conduit hanger runs where you are splicing rod at height.
4) What is this 3/8-16 coupling actually used for on an electrical job?
It splices two lengths of 3/8 inch threaded rod into one continuous hanger, which is how you drop conduit, cable tray, strut, or luminaires from a deck when a single rod is too short. It is an electrical fitting connector, not a structural anchor, so the rod and its anchorage still carry the load.
5) Can I use the RCTL28 to extend 3/8 inch rod on an existing hanger without pulling the anchor?
Yes, as long as the existing rod is 3/8-16 and you have enough free rod end to thread into the coupling. Spin the coupling onto the installed rod, then thread the new section in from below. No change to the anchor or the strut is needed.
6) How is the Metallics RCTL28 packaged for a stockroom?
It ships as a jar of 50 couplings, which is the usual way MRO and electrical stockrooms carry small threaded fittings: one container on the shelf, countable, no loose bagged hardware rolling around the van.
How fast can I get the Metallics RCTL28 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 Metallics RCTL28 come with a warranty?
Absolutely. The Metallics RCTL28 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 Metallics RCTL28?
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 Metallics RCTL28 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.