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Durable Hex Coupling Nuts from China Suppliers | Extension Nuts Factory for Structural and Mechanical Applications
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 (FAQ)
We offer coupling nuts in Carbon Steel, Stainless Steel (SS304, SS316), Alloy Steel, and Brass (available upon request) to suit different environmental and strength requirements.
Yes, our coupling nuts are manufactured in compliance with major standards including DIN 6334, ASME B18.2.2, and ISO 4032. We can also customize them according to your specific drawings or requirements.
We offer multiple finish options, including Zinc Plated (Clear, Yellow, or Blue), Black Oxide, Hot-Dip Galvanized (HDG) for outdoor/harsh environments, as well as Plain and Polished finishes.
Absolutely. We offer a wide size range from M5 to M48 for metric sizes and 1/4" to 2" for inch sizes. Custom lengths, sizes, and thread configurations (Metric, UNC, UNF, BSW, BSP) are fully supported.
Our standard lead time ranges from 7 to 30 days, depending on the order volume and customization requirements. All orders are shipped directly from Tianjin Port, China.
We provide standard bulk packaging in cartons and pallets. We also offer retail boxes, plastic bags, or custom-branded packaging tailored to your marketing and distribution needs.