Products Description
High-Performance Threaded Rods
Our threaded rods provide a versatile fastening solution where standard bolts are too short or where custom lengths are required for suspended ceilings, HVAC installation, and heavy equipment anchoring.
1. Standard Compliance & Specifications
We offer a comprehensive range of diameters and lengths, ensuring compatibility with international engineering standards.
Table 1: International Standards for Threaded Rods
| Feature | DIN Standard | ISO Standard | ANSI/ASME Standard |
| Metric Threaded Rod | DIN 975 / 976 | ISO 965 | ASME B18.31.3 |
| Property Classes | 4.8, 8.8, 10.9, 12.9 | Class 4.8 - 12.9 | Grade 2, 5, B7 |
| Thread Type | Coarse / Fine | Coarse / Fine | UNC / UNF / ACME |
2. Material Grades & Mechanical Properties
The strength of a threaded rod is defined by its material composition and heat treatment. Sunning Industries provides options ranging from low-carbon steel for general use to high-strength alloy steel for structural anchoring.
Table 2: Material Grade and Load Capacity Reference
| Grade/Class | Material | Tensile Strength (Min) | Common Applications |
| Class 4.8 | Low Carbon Steel | 400 MPa | HVAC, Pipe Hanging, DIY |
| Class 8.8 | Medium Carbon Steel | 800 MPa | Steel Structures, Machinery |
| ASTM A193 B7 | Chromium-Moly Alloy | 125 ksi (860 MPa) | Oil & Gas, High Pressure |
| A2 / A4 (SS) | Stainless Steel 304/316 | 700 MPa | Marine, Chemical, Food |
3. Surface Treatment for Global Environments
To ensure long-term durability in diverse climates—from the humidity of Southeast Asia to the harsh winters of Russia—we offer a variety of protective coatings.
Table 3: Corrosion Resistance Guide
| Finish Type | Salt Spray Resistance | Appearance | Best For |
| Zinc Plated | 24 - 72 Hours | Bright Silver/Blue | Indoor, Dry conditions |
| Hot-Dip Galv (HDG) | 500 - 1000 Hours | Matte Grey | Outdoor, Coastal areas |
| Black Oxide | < 12 Hours | Matte Black | Oiled machinery parts |
| Dacromet | 1000+ Hours | Silver Grey | High-end industrial/Auto |
Why Sunning Industries is Your Trusted Partner
Precision Rolling: Our cold-rolling process ensures no burrs and a smooth thread engagement that reduces installation time.
Custom Lengths: While standard lengths are 1m, 2m, and 3m (or 3ft, 6ft, 12ft), we provide custom cutting and chamfering services in our Handan factory.
CIS & Global Logistics: We are experts in the documentation and rail/sea logistics required for seamless delivery to Russia, Europe, and Africa.
Professional Q&A
Q: What is the difference between DIN 975 and DIN 976?
A: DIN 975 is the older standard that generally refers to 1-meter long threaded rods. DIN 976 is the modern standard that covers threaded studs of various specific lengths, often including chamfered ends for easier nut assembly. We supply both based on your project's specific terminology.
Q: Can your B7 threaded rods withstand high-temperature environments?
A: Yes. Our ASTM A193 Grade B7 threaded rods are specifically designed for high-pressure and high-temperature service, commonly used in pressure vessels, valves, and flanges in the oil and power industries.
Q: Do you offer color-coding on the ends of the rods?
A: Yes, we follow international color-coding standards (e.g., Yellow for 8.8, Red for 10.9) to help your warehouse and job-site teams quickly identify the correct grade, preventing installation errors.