Stainless Steel Products Manufacturer
As a Stainless steel products manufacturer, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.
Zhejiang Donghe Machinery Technology Co., Ltd. is a high-tech enterprise and a leading stainless steel products manufacturer in China, specializing in the development, manufacturing, and sales of fasteners. With over 100 sets of machines, a dedicated team of more than 100 employees, and an annual production capacity of 8,000 tons, we supply a comprehensive range of stainless steel screws, nuts, bolts, and stamped parts. Our products are exported to Europe, Australia, Africa, and the United States, serving industries that demand corrosion resistance, precision, and long-term reliability.
Our factory in Jiashan County, Zhejiang Province, operates under ISO 9001:2000 quality management standards, ensuring every batch meets international specifications. We produce to GB, DIN, ANSI, and BS standards, and we also customize non-standard fasteners to your drawings or samples. Whether you need A2 (304) stainless steel for general outdoor use or A4 (316) for marine environments, our engineering team provides the technical support to match the right product to your application.
Our Stainless Steel Product Range
We offer a broad portfolio of stainless steel fasteners, each designed for specific joining requirements. Below is our core range and where each product type fits:
| Product Type |
Typical Applications |
Key Features |
| Stainless Steel Screws |
Woodworking, decking, outdoor furniture, metal-to-metal |
Self-tapping points, coarse threads, multiple drive types |
| Stainless Steel Nuts |
Structural joints, machinery assembly, automotive |
Hex, square, lock, cap, and flanged designs |
| Stainless Steel Bolts |
Heavy-duty construction, flanges, equipment mounting |
High tensile strength, corrosion resistance |
| Stainless Steel Stamping |
Washers, retaining rings, custom stamped parts |
Precision stamping, consistent dimensions |
Application Fit and Material Selection
Choosing the right stainless steel grade is critical for performance. Our A2 (304) stainless steel offers excellent general corrosion resistance, ideal for indoor and outdoor applications where moisture and mild chemicals are present. For harsher environments—such as coastal areas, marine construction, or exposure to chlorides—we recommend A4 (316) stainless steel, which contains molybdenum for enhanced pitting resistance.
Our fasteners are engineered for specific substrates. For wood applications, we provide screws with sharp gimlet points and deep coarse threads that cut into timber without pre-drilling, reducing installation time and improving pull-out strength. For metal-to-metal joints, our self-tapping and thread-forming screws create secure connections in thin sheet metal. We also supply bolts and nuts for structural connections where tensile strength and fatigue resistance are paramount.
Critical Specifications and Performance
Our stainless steel fasteners are manufactured to meet international standards, with typical tensile strengths of 500 MPa for A2-70 grade. We control dimensional accuracy throughout production, ensuring threads, head geometry, and lengths conform to spec. Available drive types include Torx, Phillips, and Square, with Torx minimizing cam-out for efficient installation. Lengths range from 10 mm to 300 mm, and diameters from 3 mm to 8 mm, covering most standard requirements.
For custom projects, we can adjust thread pitch, head style, point configuration, and material grade to match your specific load and environmental conditions. Our in-house laboratory and optical sorting technology verify that every batch meets quality criteria before shipment.
Configuration Options and Automation Integration
We understand that production lines require consistent, reliable fasteners. Our products are available in bulk packaging or collated strips for automated driving systems. We can also provide custom packaging, such as small boxes or blister packs, for retail distribution. For high-volume users, we offer just-in-time delivery scheduling to keep your inventory optimized.
If your application involves automated assembly, we ensure our fasteners have tight tolerances on head height, drive depth, and thread form to prevent jams and driver wear. Our technical team can advise on the optimal drive type and point geometry for your specific tooling.
Quality Assurance and Acceptance Testing
Quality is built into every step of our manufacturing process. We operate a dedicated laboratory equipped to test hardness, tensile strength, and corrosion resistance. Each production lot is inspected using optical sorting technology to detect dimensional defects and surface flaws. We follow ISO 9001:2000 procedures, and our quality management system is certified, ensuring traceability and consistency.
For critical applications, we can provide material certificates and test reports upon request. Our acceptance testing includes dimensional verification, thread gauging, and salt spray testing for corrosion resistance, depending on the product specification.
Installation, Maintenance, and Serviceability
Proper installation is key to maximizing fastener performance. For wood screws, we recommend using a pilot hole in hardwoods to prevent splitting, while our self-tapping designs eliminate this need in softwoods. For metal applications, ensure the screw length is appropriate for the material thickness to achieve full thread engagement.
Stainless steel fasteners require minimal maintenance, but in highly corrosive environments, periodic inspection is advised. Our products are designed for easy removal and replacement, and we stock common sizes to support ongoing maintenance needs. We also provide technical documentation, including installation guides and material data sheets, to support your team.
Information We Use to Configure Your Solution
To prepare an accurate quotation and configuration, we need the following project details:
- Application description (e.g., wood decking, metal roofing, marine equipment)
- Required material grade (A2/304 or A4/316) and any specific standards (DIN, GB, ANSI, BS)
- Dimensions: diameter, length, thread pitch, and head style
- Quantity and packaging preferences (bulk, boxed, collated)
- Environmental conditions (humidity, chemical exposure, temperature)
- Any custom features: drive type, point type, or special coating
With this information, our engineering team will recommend the optimal product configuration and provide a detailed proposal, including lead times and delivery terms.
Frequently Asked Questions
1. What is the difference between A2 and A4 stainless steel fasteners?
A2 (304) stainless steel offers good corrosion resistance for most indoor and outdoor applications. A4 (316) contains molybdenum, providing superior resistance to chlorides and marine environments. For coastal or chemical exposure, we recommend A4.
2. Can you produce non-standard stainless steel fasteners?
Yes, we specialize in custom fasteners. Send us your drawings or samples, and our R&D team will develop tooling and production processes to meet your exact specifications, including custom lengths, threads, and head styles.
3. Do your stainless steel screws work with treated lumber?
Yes, our A2 and A4 stainless steel screws resist the corrosive effects of ACQ and other copper-based preservatives. For treated lumber, we recommend A4 (316) for maximum longevity.
4. What is your minimum order quantity?
Our MOQ varies by product type and size. For standard items, we can accommodate small trial orders. For custom products, a higher MOQ may apply due to tooling costs. Contact us for specific requirements.
5. How do you ensure quality consistency across large orders?
We follow ISO 9001:2000 procedures, with in-process inspections and final testing using optical sorting. Each batch is traceable, and we provide material certificates upon request.
