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High-Quality Rod Coupling Nuts


High-Quality Rod Coupling Nuts & Reducing Couplings

What is a Rod Coupling Nut?

A rod coupling nut (also commonly known as an extension nut) is an elongated, heavy-duty industrial fastener specifically designed to securely join two externally threaded objects together in a continuous straight line. Manufactured from premium, highly durable materials, these elongated nuts are most frequently used to connect and extend the length of continuous threaded rods, pipes, or hanger studs in structural, plumbing, and mechanical suspension applications.

Available Styles and Assembly Configurations

To accommodate a wide variety of structural extensions and framing assemblies, U-Bolt-It supplies rod coupling nuts in two primary configurations:

  • Standard Rod Coupling Nuts: Engineered with a continuous, consistent internal thread diameter from end to end, perfectly designed to seamlessly join two rods or threaded studs of the exact same size.
  • Reducing Coupling Nuts: A highly specialized variation featuring two different internal thread sizes on opposing ends. These are essential when your structural assembly requires you to securely couple two or more studs of completely different diameters into a single, cohesive joint.

Request a Quote Today

Have a question about our manufactured rod coupling nuts or need help determining the right reducing coupling for your structural extension? Contact our team by using our secure online form to submit your project details. You can also give us a call today to speak directly with our fastener specialists. We look forward to speaking with you!

Types of Rod Coupling Nuts


Filter By:
SKU NAME DIAMETER THREAD LENGTH DETAILS
NCPLL010075 10-24 X 3/4 COUPLING NUT LONG ZINC PLATED 10 24 3/4
NCPLL043175 7/16-14 X 1 3/4 COUPLING NUT LONG ZINC PLATED 7/16 14 1 3/4
NCPLL087250 7/8-9 X 2 1/2 COUPLING NUT LONG ZINC PLATED 7/8 9 2 1/2
NCPLS043125 7/16-14 X 1 1/4 COUPLING NUT SHORT ZINC PLATED 7/16 14 1 1/4
NCPLL031175 5/16-18 X 1 3/4 COUPLING NUT LONG ZINC PLATED 5/16 18 1 3/4
NCPLL0622112 5/8-11 X 2 1/8 COUPLING NUT LONG ZINC PLATED 5/8 11 2 1/8
NCPLS031087 5/16-18 X 7/8 COUPLING NUT SHORT ZINC PLATED 5/16 18 7/8
NCPLL037175 3/8-16 X 1 3/4 COUPLING NUT LONG ZINC PLATED 3/8 16 1 3/4
NCPLL075225 3/4-10 X 2 1/4 COUPLING NUT LONG ZINC PLATED 3/4 10 2 1/4
NCPLS037112 3/8-16 X 1 1/8 COUPLING NUT SHORT ZINC PLATED 3/8 16 1 1/8
NCPLL025175 1/4-20 X 1 3/4 COUPLING NUT LONG ZINC PLATED 1/4 20 1 3/4
NCPLL050175 1/2-13 X 1 3/4 COUPLING NUT LONG ZINC PLATED 1/2 13 1 3/4
NCPLL100250 1-8 X 2 1/2 COUPLING NUT LONG ZINC PLATED 1 8 2 1/2
NCPLL125300 1 1/4-7 X 3\ COUPLING NUT LONG ZINC PLATED" 1 1/4 7 3
NCPLS025087 1/4-20 X 7/8 COUPLING NUT SHORT ZINC PLATED 1/4 20 7/8
NCPLS050125 1/2-13 X 1 1/4 COUPLING NUT SHORT ZINC PLATED 1/2 13 1 1/4