Products Description
Professional Fastening Solutions by Sunning Industries
For over 20 years, Sunning Industries has been a premier manufacturer and exporter of high-quality fasteners. With our industrial factory based in Handan and our international trade headquarters in Zhengzhou, we bridge the gap between world-class manufacturing and global logistics.
Our commitment to DIN, ISO, and ANSI standards has made us a trusted partner for buyers across America, Europe, the Middle East, Southeast Asia, Africa, and the CIS region.
1. High-Tensile Hexagon Bolts
Our bolts are engineered for heavy-duty structural applications. We offer a complete range of property classes from 4.8 to 12.9 to meet various tensile strength requirements.
International Standard Comparison for Hex Head Fasteners
| Product Type | DIN (Germany) | ISO (International) | ANSI/ASME (USA) |
| Hex Head Bolt (Partial Thread) | DIN 931 | ISO 4014 | B18.2.3.1M |
| Hex Head Screw (Full Thread) | DIN 933 | ISO 4017 | B18.2.3.5M |
| Hex Socket Cap Screw | DIN 912 | ISO 4762 | B18.3.1M |
| Heavy Hex Structural Bolt | DIN 6914 | ISO 7412 | B18.2.6 |
2. Industrial Grade Nuts
To ensure maximum security, our nuts are precision-tapped to provide a seamless fit with our bolt range. We prioritize thread integrity to prevent loosening in high-vibration environments.
Property Class and Material Mapping
| Nut Type | Standard | Size Range | Material / Grade |
| Standard Hex Nut | DIN 934 / ISO 4032 | M3 - M64 | Class 8, 10, 12 |
| Nylon Insert Lock Nut | DIN 985 / ISO 10511 | M3 - M48 | Class 5, 8, 10 |
| Thin Hex Nut | DIN 439 / ISO 4035 | M2 - M52 | Carbon Steel / SS304 |
| Heavy Hex Nut | ASTM A563 | 1/4" - 4" | Grade DH / 2H |
3. Precision Flat & Spring Washers
Our washers provide the perfect bearing surface to distribute loads and protect the surface of your components.
Standard Dimensions for Plain Washers (Metric)
| Nominal Size | Inside Diameter (mm) | Outside Diameter (mm) | Thickness (mm) |
| M10 | 10.5 | 20.0 | 2.0 |
| M12 | 13.0 | 24.0 | 2.5 |
| M16 | 17.0 | 30.0 | 3.0 |
| M20 | 21.0 | 37.0 | 3.0 |
Why Choose Sunning Industries?
Global Export Expertise: Over two decades of experience navigating customs and quality requirements in Russia, the Middle East, and the Americas.
Quality Compliance: Our Handan factory operates under strict ISO 9001:2015 quality management systems.
Diverse Finishes: We offer Plain, Zinc (White/Yellow/Blue), Hot-Dip Galvanized (HDG), and Dacromet coatings for superior corrosion resistance.
Professional Q&A for Global Buyers
Q: Are your fasteners compliant with the latest 2026 EU environmental regulations?
A: Yes. All our galvanized products utilize Trivalent Chromium (Cr3+) plating, ensuring full compliance with REACH and RoHS 3.0 environmental standards for the European market.
Q: How do you ensure the quality of high-strength Class 10.9 and 12.9 bolts?
A: Every batch undergoes rigorous mechanical testing in our Handan facility, including tensile strength, yield stress, and Charpy impact testing. We provide a full Mill Test Certificate (MTC) according to EN 10204 3.1 with every shipment.
Q: Can you handle mixed-container shipments for different fastener types?
A: Certainly. We specialize in consolidating various items—bolts, nuts, washers, and tool accessories—into a single shipment to help our partners in Southeast Asia and Africa optimize their logistics costs.