Steel Hex Coupling Nut with Flange for Industrial Threaded Fastener

Qimao Metal Manufacturer is a professional Steel Hex Coupling Nut with Flange For Industrial Threaded Fastener factory. We machine these from carbon steel with zinc plating for basic rust protection. Used in threaded rod assemblies, structural supports, and equipment leveling. Simple part. But when you need to join two threads securely, nothing else works as well.

Product Advantages

The flange saves you time

A regular coupling nut needs a separate washer if you're tightening against a surface. And you still have to figure out how deep to run it. Our products Steel Hex Coupling Nut does both jobs. Tighten until the flange touches. Stop. That's it. No washer needed. No measuring.

No more lost washers

We've all been there. You're on a job site or in a shop. You drop the washer. It rolls under something. You spend two minutes looking for it. Our flange is built in. Nothing to drop. Nothing to lose.

Hex shape works with standard tools

No special wrenches needed. A standard socket or combination wrench fits the hex flats on both ends and the middle. Same size across the whole nut usually. Grab your wrench and go.

Product Parameter (Specification)

Installation Tips

Use two wrenches

Hold the coupling nut with one wrench. Turn the rod with another. If you only use one wrench, the Steel Hex Coupling Nut with Flange For Industrial Threaded Fastener just spins on the rod instead of tightening.

Don't over-torque

A coupling nut is strong, but the threads on your rod might not be. Snug is usually enough. If you need specific torque values, look up standard torque for your thread size and grade.

The flange goes against the surface

Sounds obvious, but we've seen people put the flange facing away from the surface. The flange is there to stop against something. Put it on the side that contacts your bracket, frame, or washer.

Use anti-seize for stainless

If you order stainless steel instead of Zinc plating, use anti-seize compound on the threads. Stainless galls easily. Without anti-seize, the nut and rod can weld themselves together.

Production Details

Qimao Metal Manufacturer machines Steel Hex Coupling Nut with Flange For Industrial Threaded Fastener from high hardness steel. Thread sizes from 1/4-20 up to 1/2-13 and M6 to M12. Overall length varies by thread — typically 1 inch for 1/4-20, up to 2 inches for 1/2-13. The flange sits right in the middle, about 1.5 to 2 times the hex width. Zinc plating is standard. Hex flats are consistent across the whole nut — same wrench size on both ends and the flange area. Thread class 2B for inch sizes, 6H for metric. No burrs inside the threads. We check every batch with a go/no-go gauge.