When you need a fastener for humid, corrosive, or demanding environments, stainless steel 316 offers a practical material choice. A screw must also provide reliable torque transmission, dimensional consistency, and compatibility with established standards. The DIN 912 stainless steel knurled-head socket cap screw from Shenhu combines SUS316 (A4-70) and SUS304 (A2-70) options with a hex socket drive, knurled cylindrical head, and metric sizes from M1.6 to M64. You can use it in machinery, marine equipment, CNC machines, industrial automation, and other applications where long-term fastening stability matters.
Why Choose Stainless Steel 316 for Socket Cap Screws?
SUS316 is particularly relevant when your assembly faces moisture, chloride exposure, or corrosive operating conditions. According to the supplied product specifications, the A4-70 version contains at least 2% molybdenum and provides a neutral salt spray rating of at least 100 hours.
For comparison, the SUS304 A2-70 version has a neutral salt spray rating of at least 48 hours. This difference makes stainless steel 316 screws a suitable option for applications where corrosion resistance is a key purchasing consideration.
You can consider SUS316 socket cap screws for:
- Offshore and marine equipment
- Coastal power installations
- Chemical processing environments
- Outdoor structures
- Industrial machinery
- CNC machines and precision fixtures
- Industrial robots and automation equipment
The product uses passivation and has a specified surface roughness of Ra ≤0.8 μm. This supports consistent surface quality while helping the screw withstand demanding environments.
DIN 912 and ISO 4762 Socket Cap Screw Compatibility
For international procurement, standard compatibility can simplify specification and replacement decisions. This DIN 912 socket cap screw complies with DIN 912 and ISO 4762:1997 and also meets ASME B18.3 requirements according to the product information.
The screw supports M1.6–M64 thread sizes and lengths from 4 mm to 200 mm. You can select full-thread or partial-thread configurations depending on your assembly requirements.
| Specification | Product Details |
|---|---|
| Material | SUS304 (A2-70) / SUS316 (A4-70) |
| Standard | DIN 912 / ISO 4762:1997 / ASME B18.3 |
| Thread Size | M1.6–M64 |
| Length | 4–200 mm |
| Tensile Strength | ≥700 MPa for A2-70 and A4-70 |
| Head Design | Cylindrical knurled head |
| Drive | Hex socket |
| Thread Accuracy | Class 6g |
| Surface Finish | Passivated, Ra ≤0.8 μm |
| Compliance | RoHS, REACH |
This combination allows you to source a metric ISO 4762 screw while maintaining compatibility with common international fastening specifications.
Knurled Head and Hex Socket Drive Improve Assembly Control
The knurled cylindrical head provides additional grip during manual handling. Shenhu offers straight or diamond knurling patterns, with a specified knurl pitch of 0.4–1.2 mm.
The internal hex socket also helps transfer torque while reducing the risk of drive slippage. This is useful when you work with compact assemblies, CNC equipment, industrial robots, or precision fixtures where access and installation space can be limited.
For automated or repeatable assembly, dimensional consistency becomes equally important. Shenhu uses cold forging, precision threading, and passivation processes, while the product specification defines Class A dimensional tolerances and Class 6g thread accuracy.
How to Select the Right Stainless Steel 316 Screw
You can use the following process before placing a bulk or OEM order:
- Confirm the material requirement. Choose SUS316 when your application requires higher corrosion resistance, particularly in chloride-exposed environments.
- Check the standard. Confirm whether DIN 912, ISO 4762, or ASME B18.3 matches your existing assembly specification.
- Select thread size and length. The available range is M1.6–M64 and 4–200 mm.
- Choose the thread configuration. Specify full-thread or partial-thread based on your clamping requirements.
- Confirm head and drive details. Check the knurled pattern, head dimensions, and hex socket size before production.
- Verify quality requirements. Review material grade, tolerances, passivation, RoHS and REACH compliance, and packaging requirements.
This process helps you reduce specification errors and select a stainless steel 316 screw supplier that can support your application requirements.
Why Source Stainless Steel Fasteners from Shenhu?
Shenhu Precision Parts (Hong Kong) Limited was established in 1984 and has more than 40 years of fastener R&D and manufacturing experience. Its production capabilities include more than 100 advanced machines and an annual output of approximately 500 million pieces.
Shenhu also maintains IATF16949, ISO9001, and ISO45001 system certifications. These credentials are relevant when you need a supplier with documented quality, occupational safety, and automotive-related management systems.
The company provides both standard and custom fasteners for industries including:
- New energy and photovoltaic systems
- Energy storage and lithium batteries
- Automotive
- Medical equipment
- Communication equipment
- Mechanical equipment
- Military applications
For international buyers, Shenhu’s combination of standard-compliant products, material options, custom specifications, and one-stop production support can simplify sourcing.
FAQ
1. What is a stainless steel 316 DIN 912 screw?
It is a socket head cap screw manufactured from SUS316 stainless steel and designed around the DIN 912 specification. The product uses an internal hex drive and is available in metric sizes.
2. Is SUS316 better than SUS304 for corrosive environments?
SUS316 generally provides stronger corrosion resistance than SUS304, particularly where chloride exposure is a concern. In the supplied specifications, SUS316 has a neutral salt spray rating of ≥100 hours compared with ≥48 hours for SUS304.
3. What sizes are available?
The product supports thread sizes from M1.6 to M64 and lengths from 4 mm to 200 mm. Both full-thread and partial-thread versions are available.
Conclusion
Choosing stainless steel 316 for a DIN 912 socket cap screw can help you address corrosion resistance, torque transmission, and long-term fastening requirements in demanding industrial environments. With SUS316 and SUS304 options, M1.6–M64 sizes, ISO 4762 compatibility, passivated surfaces, and documented quality systems, Shenhu Precision Parts (Hong Kong) Limited provides a practical sourcing option for machinery, marine, automation, automotive, and other industrial applications.
CTA
Need a specific size, thread configuration, or material grade? Contact Shenhu to confirm the required DIN 912/ISO 4762 specification, SUS316 grade, dimensions, packaging, and OEM requirements before placing your order.
