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Durable Coupling Nuts from China | Hex Coupling Nuts Suppliers | Extension Nuts Factory
Product Overview
| Product Name | Coupling Nut / Hex Coupling Nut / Rod Coupler / Extension Nut |
| Standards | DIN 6334, ASME B18.2.2, ISO 4032, or customized |
| Material |
Carbon Steel Stainless Steel (SS304, SS316) Alloy Steel Brass (available on request) |
| Grade | 4, 6, 8, 10, 12 / A2-70, A4-80 |
| Thread Type | Metric / UNC / UNF / BSW / BSP |
| Finish Options |
Zinc Plated (Clear / Yellow / Blue) Black Oxide Hot-Dip Galvanized (HDG) Plain / Polished |
| Size Range |
Metric: M5 – M48 Inch: 1/4" – 2" Custom lengths and sizes available |
Product Features
Hexagonal shape for easy installation using a standard wrench
Used to join threaded rods and extend their length
Available in long or short types to suit different load requirements
Ideal for tensioning systems and structural support
Manufactured with high precision for strong and reliable thread engagement
Optional left-hand or right-hand thread combinations available
Applications
Construction and steel structure connections
HVAC and plumbing installations
Tensioning rods in bridges and towers
Equipment assembly and maintenance
Electrical supports and mounting systems
Solar panel structures and renewable energy systems
Packaging & Delivery
| Packaging |
Bulk in cartons and pallets Retail boxes, plastic bags, or custom-branded packaging available |
| Lead Time | 7–30 days depending on quantity and customization |
| Shipping Port | Tianjin, China |
Why Choose Hebei Chudu
- Over a decade of expertise in fastener production and global export.
- ISO 9001 certified with complete quality inspection process.
- Custom sizes, materials, and threads available for special applications.
- Competitive pricing, short lead time, and stable supply.
- Support for OEM/ODM orders and professional export service.
- Extensive product range for industrial, commercial, and structural fastening.
Frequently Asked Questions
1. What is the primary purpose of a coupling nut?
A coupling nut, also referred to as an extension nut, is specifically designed to join two threaded rods or male fasteners together, effectively extending their total length in structural or tensioning systems.
2. What materials and grades do you offer for hex coupling nuts?
We manufacture coupling nuts in Carbon Steel, Stainless Steel (SS304, SS316), Alloy Steel, and Brass. Available grades include metric classes 4, 6, 8, 10, and 12, as well as stainless steel grades A2-70 and A4-80.
3. Can you customize the thread types and dimensions?
Yes, we provide extensive customization options. We support various thread types including Metric, UNC, UNF, BSW, and BSP. Custom lengths, custom hex sizes, and left-hand/right-hand thread combinations can be produced upon request.
4. What surface treatment options are available?
Our standard finish options include Zinc Plated (Clear, Yellow, and Blue), Black Oxide, Hot-Dip Galvanized (HDG) for enhanced corrosion resistance, and Plain/Polished finishes.
5. What is the minimum lead time and shipping process?
Our typical lead time ranges from 7 to 30 days, depending on the order volume and customization requirements. All orders are securely packaged in bulk cartons and pallets (or custom packaging) and shipped from Tianjin Port, China.