Nuts
Coupling Nuts
Extended Hex Nuts / Rod Coupling Nuts
Our coupling nuts (also known as extended hex nuts or rod coupling nuts) are elongated hexagonal nuts designed to join two threaded rods or bolts end-to-end. Manufactured through precision cold heading, they provide a reliable threaded connection for extending rod lengths in structural, mechanical, and construction assemblies. Available in carbon steel with black oxide finish and zinc-plated stainless steel variants.
Key Features
Elongated hexagonal profile for secure rod-to-rod joining
Full internal threading for maximum engagement depth
Cold-headed for superior strength and consistency
Available in carbon steel and stainless steel grades
Multiple surface treatments: black oxide, zinc, HDG
Custom lengths and thread pitches available
Technical Specifications
| Product Name | Coupling Nuts (Extended Hex Nuts) |
| Chinese Name | 加长六角螺母 |
| Brand | ZCM / Zhongchun |
| Grade | 4 / 8 / 10 |
| Material | Carbon Steel, Stainless Steel (304/316), Alloy Steel |
| Size Range | M6 - M24 |
| Thread | Full Internal Thread |
| Shape | Elongated Hexagonal |
| Surface Treatment | Plain, Zinc Plated (White/Yellow/Blue), Black Oxide, HDG, Dacromet |
| Standards | DIN 6334, GB/T Custom |
| Packaging | Carton + Pallet, or per customer request |
| MOQ | Contact us for details |
| Lead Time | 15 days for standard orders |
Applications
Coupling nuts are essential for extending threaded rod lengths and are widely used in construction, industrial, and mechanical applications.
Joining threaded rods end-to-end for extended lengths
Structural steel connections and framework assembly
Concrete formwork and tie rod systems
Pipe hanger and support rod extensions
Mechanical equipment and machine base leveling
Construction scaffolding and bracing systems
Electrical conduit and cable tray installations
HVAC duct suspension and mounting systems
Interested in Coupling Nuts?
Send us your specifications for a competitive quote. Standard orders delivered in 15 days.