Product Overview
The stainless steel hex bolt is one of the most widely used fasteners in construction, machinery, marine equipment and outdoor installations. DonMo Hardware produces hex bolts in both SS304 (A2-70) for general-purpose corrosion resistance and SS316 (A4-70) for marine, coastal and chemical environments where superior corrosion protection is required.
Our hex bolts are available in DIN933 (full thread) and DIN931 (half thread) versions, covering metric sizes from M3 to M24 with standard lengths from 6mm to 300mm. Custom lengths, non-standard thread pitches and special head markings can be produced for OEM and project orders.
All bolts undergo dimensional inspection, thread gauge testing and hardness verification before shipment. We maintain ready stock for popular sizes (M6, M8, M10, M12, M16) to support fast delivery for urgent orders.
Key Features
- Corrosion Resistant: SS304 and SS316 stainless steel provide excellent rust and corrosion resistance for indoor and outdoor applications.
- Standard Compliance: Manufactured to DIN933 / DIN931 / ISO4017 / ISO4014 specifications with consistent dimensional accuracy.
- Full & Half Thread: Available in full thread (DIN933) for thin material fastening and half thread (DIN931) for structural connections.
- Wide Size Range: M3 to M24 diameter, lengths from 6mm to 300mm, with custom lengths available.
- Quality Tested: 100% dimensional inspection, thread go/no-go gauge testing, hardness testing and material certification on every batch.
- Flexible Packaging: Bulk packing, small box packing, labeled cartons or custom packaging per customer requirement.
Specifications
| Parameter |
Specification |
| Product Name |
Stainless Steel Hex Bolt |
| Standard |
DIN933 (Full Thread), DIN931 (Half Thread), ISO4017, ISO4014, ANSI/ASME B18.2.1 |
| Material |
SS304 (A2), SS316 (A4), Carbon Steel (Grade 4.8 / 8.8) |
| Grade |
A2-70, A4-70, Grade 4.8 / 8.8 / 10.9 |
| Diameter Range |
M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24 |
| Length Range |
6mm – 300mm (custom lengths available) |
| Thread Type |
Metric coarse thread (standard), fine thread available on request |
| Surface Finish |
Plain (natural), passivated, polished |
| Head Type |
Hexagonal head (external hex drive) |
| MOQ |
Standard sizes: 100 pcs / size; Custom: 500 pcs |
| Lead Time |
Stock items: 3–5 days; Custom production: 15–25 days |
| Certification |
ISO9001, Material Test Report (MTR), Certificate of Conformity |
Applications
Stainless steel hex bolts are used across a wide range of industries and applications where reliable fastening and corrosion resistance are needed:
- Construction & Civil Engineering: Steel structure connections, facade mounting, railing and handrail assembly, outdoor equipment installation.
- Marine & Coastal: Boat fittings, dock hardware, coastal construction, offshore equipment — SS316 recommended for saltwater exposure.
- Machinery & Equipment: Industrial machinery assembly, conveyor systems, pump and valve mounting, automation equipment.
- Food & Chemical: Food processing equipment, pharmaceutical machinery, chemical plant piping — stainless steel meets hygiene and corrosion requirements.
- Solar & Renewable Energy: Solar panel mounting structures, wind turbine components, outdoor renewable energy installations.
- Furniture & Display: Outdoor furniture, commercial display fixtures, kitchen equipment, stainless steel fabrication.
SS304 vs SS316 — Which Should You Choose?
| Property |
SS304 (A2-70) |
SS316 (A4-70) |
| Corrosion Resistance |
Good for indoor and mild outdoor |
Superior, especially against saltwater and chemicals |
| Molybdenum Content |
None |
2–3% (enhances corrosion resistance) |
| Typical Applications |
General construction, machinery, furniture |
Marine, coastal, chemical, medical, food processing |
| Cost |
Lower |
Higher (approximately 20–40% more) |
| Magnetic |
Slightly magnetic after cold working |
Slightly magnetic after cold working |
Recommendation: Use SS304 for most indoor and general outdoor applications. Choose SS316 for coastal areas, marine equipment, chemical processing, or any environment with regular saltwater or chemical exposure.
Frequently Asked Questions
Q: What is the minimum order quantity for stainless steel hex bolts?
A: For standard sizes in stock, the MOQ is 100 pieces per size. For custom sizes, custom lengths or non-standard materials, the MOQ is typically 500 pieces. Small trial orders are welcome for new customers.
Q: Can you produce hex bolts according to our own drawings or specifications?
A: Yes. We offer OEM and ODM services. Send us your drawings (PDF / DWG / STEP), specifications or sample photos, and our engineering team will review and provide a quote. Custom head markings, lengths, thread types and packaging are all available.
Q: Do you provide material certificates and test reports?
A: Yes. Every batch comes with a Certificate of Conformity. Material Test Reports (MTR / EN 10204 3.1) are available on request, including chemical composition and mechanical property test results.
Q: What is the production lead time?
A: Standard sizes in stock can ship within 3–5 working days. Custom production typically takes 15–25 working days depending on quantity and complexity. Urgent orders can be prioritized — please contact us to discuss.
Q: Can you arrange shipping to our country?
A: Yes. We work with experienced freight forwarders and can arrange sea freight, air freight or express delivery (DHL / FedEx / UPS) to most countries worldwide. We ship to Southeast Asia, Europe, the Middle East, Africa, the Americas and Oceania.
Q: What payment terms do you accept?
A: For new customers, we typically accept 30% T/T deposit and 70% balance before shipment. For established customers, more flexible terms can be discussed. We also accept L/C at sight for large orders.
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