DIN603 316 Stainless Steel Carriage Bolt
DIN603 316 stainless steel carriage bolt is a premium corrosion-resistant fastening solution designed for structural connections, outdoor installations, and harsh industrial environments. The DIN603 316 stainless steel carriage bolt features a smooth domed head and a square neck beneath the head, allowing the bolt to lock securely into wood, metal, or square mounting holes while preventing rotation during installation.
Manufactured from marine-grade 316 stainless steel, the DIN603 316 stainless steel carriage bolt offers outstanding resistance to seawater, chlorides, chemicals, and corrosive environments. It is widely used in marine engineering, construction, renewable energy systems, food processing equipment, petrochemical facilities, transportation infrastructure, and OEM manufacturing. As a high-quality stainless steel hex bolt alternative for exposed installations, it provides excellent durability and long-term fastening reliability.
Product Overview
The DIN603 316 stainless steel carriage bolt is engineered for applications requiring both structural strength and an attractive finished appearance. The large round head creates a smooth exposed surface, reducing the risk of injury while enhancing aesthetics. The square neck grips the installation material during tightening, eliminating the need to hold the bolt head with a second tool.
Compared with 304 stainless steel, the DIN603 316 stainless steel carriage bolt contains molybdenum, providing superior resistance to chloride corrosion and pitting. This makes it particularly suitable for coastal areas, offshore platforms, chemical processing plants, and other aggressive environments.
As one of the most reliable industrial fasteners, this 316 stainless steel carriage bolt is widely specified by engineers, EPC contractors, OEM manufacturers, and industrial buyers requiring dependable fastening performance.
Product Specifications
| Item | Description |
|---|---|
| Standard | DIN603 |
| Product Name | DIN603 316 Stainless Steel Carriage Bolt |
| Material | 316 Stainless Steel |
| Thread Type | Metric Partial Thread / Full Thread Available |
| Head Type | Large Round Head |
| Drive Type | Square Neck Anti-Rotation |
| Diameter Range | M5–M24 |
| Length Range | 12mm–300mm |
| Surface Finish | Natural Stainless Steel / Passivated |
| Strength Grade | A4-70 / A4-80 |
| Thread Direction | Right Hand |
| Packaging | Carton, Poly Bag, Pallet, OEM Packaging |
| Customization | Size, thread length, head dimensions, marking, packaging |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥700 MPa (A4-70) / ≥800 MPa (A4-80) |
| Yield Strength | ≥450 MPa / ≥600 MPa |
| Hardness | HV 200–250 |
| Density | 8.00 g/cm³ |
| Corrosion Resistance | Excellent, especially in marine and chloride environments |
| Operating Temperature | -196°C to 400°C |
| Thread Tolerance | 6g |
| Manufacturing Standard | DIN603 / ISO 8677 |
Materials and Manufacturing Process
The DIN603 316 stainless steel carriage bolt is manufactured using advanced cold forging and precision machining processes to ensure excellent dimensional accuracy, corrosion resistance, and mechanical performance.
- Premium 316 stainless steel wire rod selection
- Cold forging for round head and square neck formation
- Hot forging for large-diameter carriage bolts when required
- CNC machining for custom dimensions and non-standard specifications
- Precision thread rolling to improve fatigue resistance and thread accuracy
- Solution annealing when required to optimize material properties
- Surface passivation to maximize corrosion resistance
- Ultrasonic cleaning to remove production residues
- Comprehensive dimensional, thread, and appearance inspections
- Export-grade packaging for global transportation
Every DIN603 316 stainless steel carriage bolt is manufactured under strict ISO quality management procedures to ensure consistent quality and reliable industrial performance.
Applications of the Product
DIN603 316 stainless steel carriage bolts are widely used in:
- Construction and steel structures
- Marine engineering and shipbuilding
- Renewable energy installations
- Petrochemical plants
- Food processing equipment
- Industrial equipment
- Water treatment facilities
- Manufacturing systems
- Transportation infrastructure
- OEM engineering projects
The smooth head design improves safety, while the square neck provides efficient anti-rotation installation for timber, metal, and composite structures.
Why Choose This Product
- Premium marine-grade 316 stainless steel
- Manufactured according to DIN603 international standard
- Excellent corrosion resistance in seawater and chemical environments
- Smooth round head for improved safety and appearance
- Square neck prevents bolt rotation during installation
- High precision manufacturing
- Stable mechanical performance
- Long service life
- Bulk supply capability
- OEM and ODM customization support
- Fast delivery for global customers
The DIN603 316 stainless steel carriage bolt delivers outstanding fastening performance for demanding industrial and marine applications.
Why Choose Flybear
Flybear is a professional manufacturer specializing in stainless steel fasteners and customized industrial fastening solutions.
Our advantages include:
- Advanced cold forging and precision thread rolling production lines
- Extensive inventory and flexible manufacturing capacity
- OEM and custom production according to drawings
- Professional engineering support
- Global supply capability
- Strict ISO quality management system
- Rich export experience
- Comprehensive technical consultation
Flybear supplies high-quality fastening solutions for OEM manufacturers, EPC contractors, distributors, and industrial buyers worldwide.
Quality Inspection and Control
Every production batch undergoes comprehensive inspection, including:
- Chemical composition analysis
- Tensile testing
- Hardness testing
- Salt spray corrosion testing
- Thread gauge inspection
- Dimensional inspection
- Surface finish inspection
- Passivation quality inspection
- Packaging inspection
All manufacturing processes comply with ISO quality management standards to ensure consistent quality and dependable industrial performance.
Selection Guide
When selecting a DIN603 316 stainless steel carriage bolt, consider:
- Material grade (316 stainless steel)
- Bolt diameter and length
- Thread length requirements
- Load capacity
- Indoor or outdoor application
- Corrosion exposure level
- Matching nuts and washers
- Engineering standards and project specifications
For marine, offshore, and highly corrosive environments, 316 stainless steel is recommended over 304 stainless steel for enhanced durability and longer service life.
FAQ
1. What is DIN603?
DIN603 is the international standard for carriage bolts with a round head and square neck.
2. What is the difference between 304 and 316 stainless steel carriage bolts?
316 stainless steel contains molybdenum, providing significantly better resistance to chloride corrosion, seawater, and harsh chemical environments.
3. Is 316 stainless steel rust resistant?
Yes. 316 stainless steel offers excellent corrosion resistance and is widely used in marine, coastal, and chemical processing applications.
4. Can custom sizes be produced?
Yes. Flybear provides OEM and ODM manufacturing for custom dimensions, thread lengths, markings, and packaging.
5. How can I request a quotation?
Please send the required size, quantity, material specification, drawings (if available), and packaging requirements for a fast quotation.
The DIN603 316 stainless steel carriage bolt provides superior corrosion resistance, reliable anti-rotation performance, and precision manufacturing, making it an ideal fastening solution for marine, industrial, and structural applications.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
For quotations, customization, and technical support, please Contact Us.
