Dacromet Carbon Steel Coach Bolt
Dacromet carbon steel coach bolt is a high-performance fastening solution designed for structural assemblies requiring excellent corrosion resistance, reliable anti-rotation performance, and long-term durability. The Dacromet carbon steel coach bolt features a smooth round head and a square neck beneath the head, allowing the bolt to lock securely into wood, metal, or preformed square holes during installation without rotating.
The Dacromet carbon steel coach bolt is widely used in construction, steel structures, solar mounting systems, transportation infrastructure, agricultural machinery, outdoor equipment, renewable energy projects, and OEM manufacturing. The Dacromet coating provides superior corrosion resistance compared with conventional zinc plating, making it suitable for harsh outdoor environments.
Product Overview
The Dacromet carbon steel coach bolt is engineered to provide secure fastening while maintaining a smooth, tamper-resistant surface. The integrated square neck prevents rotation during tightening, allowing quick installation with only one tool.
Compared with ordinary galvanized fasteners, the Dacromet carbon steel coach bolt offers significantly improved corrosion resistance without the risk of hydrogen embrittlement. The coating also provides excellent wear resistance and environmental performance, making it ideal for long-term outdoor applications.
As a premium industrial fastener, this coach bolt is widely selected by construction companies, OEM manufacturers, EPC contractors, and infrastructure projects.
Product Specifications
| Item | Description |
|---|---|
| Standard | DIN603 / ISO 8677 / Custom |
| Product Name | Dacromet Carbon Steel Coach Bolt |
| Material | Carbon 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 | Dacromet Coating |
| Strength Grade | 4.8 / 8.8 / 10.9 |
| Thread Direction | Right Hand |
| Packaging | Carton, Woven Bag, Pallet, OEM Packaging |
| Customization | Size, thread length, coating thickness, head marking, packaging |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | Grade 4.8: ≥400 MPa; Grade 8.8: ≥800 MPa; Grade 10.9: ≥1,040 MPa |
| Yield Strength | Grade 4.8: ≥320 MPa; Grade 8.8: ≥640 MPa; Grade 10.9: ≥940 MPa |
| Hardness | HRC 20–36 (depending on strength grade) |
| Density | 7.85 g/cm³ |
| Corrosion Resistance | Excellent with Dacromet coating (typically over 500 hours salt spray, depending on coating specification) |
| Operating Temperature | -50°C to 300°C |
| Thread Tolerance | 6g |
| Manufacturing Standard | DIN603 / ISO 8677 / Customer Specifications |
Materials and Manufacturing Process
The Dacromet carbon steel coach bolt is manufactured using advanced forging and coating technologies to ensure high mechanical strength and excellent corrosion protection.
- Premium carbon steel wire rod selection
- Cold forging to form the large round head and square neck
- Hot forging for large-diameter coach bolts when applicable
- CNC machining for custom dimensions and special requirements
- Precision thread rolling to improve fatigue strength
- Heat treatment for Grade 8.8 and 10.9 mechanical properties
- Dacromet coating applied through dip-spin or spray coating process
- Controlled curing process to ensure coating adhesion and durability
- Cleaning and comprehensive dimensional inspection
- Export-grade packaging for international shipment
Each Dacromet carbon steel coach bolt is manufactured under strict ISO quality management standards to ensure consistent quality and dependable industrial performance.
Applications of the Product
Dacromet carbon steel coach bolts are widely used in:
- Construction and timber structures
- Steel structures
- Renewable energy and solar mounting systems
- Highway guardrails
- Agricultural machinery
- Outdoor furniture
- Transportation infrastructure
- Industrial equipment
- Manufacturing systems
- OEM engineering projects
The smooth head design improves safety, while the square neck ensures secure anti-rotation installation in structural assemblies.
Why Choose This Product
- Premium carbon steel raw material
- Advanced Dacromet coating for superior corrosion resistance
- Excellent outdoor weather resistance
- High mechanical strength
- Square neck prevents bolt rotation
- Smooth round head enhances safety and appearance
- Long service life
- Bulk supply capability
- OEM and ODM customization support
- Fast delivery and extensive export experience
The Dacromet carbon steel coach bolt provides reliable fastening performance for demanding outdoor and industrial applications.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
Our strengths include:
- Advanced cold forging, thread rolling, and coating production lines
- Strong manufacturing capacity and inventory support
- OEM and ODM production according to drawings
- Professional engineering consultation
- Global supply capability
- Strict ISO quality management system
- Extensive export experience
- Comprehensive technical support
Flybear supplies high-quality fastening products to OEM manufacturers, distributors, EPC contractors, and industrial buyers worldwide.
Quality Inspection and Control
Every production batch undergoes comprehensive inspection, including:
- Chemical composition analysis
- Tensile testing
- Yield strength verification
- Hardness testing
- Salt spray corrosion testing
- Dacromet coating thickness inspection
- Thread gauge inspection
- Dimensional inspection
- Surface appearance inspection
- Packaging inspection
All manufacturing processes comply with ISO quality management standards to ensure consistent quality and reliable industrial performance.
Selection Guide
When selecting a Dacromet carbon steel coach bolt, consider:
- Required strength grade (4.8, 8.8, or 10.9)
- Bolt diameter and length
- Thread length
- Outdoor exposure level
- Corrosion resistance requirements
- Installation material (wood or steel)
- Matching nuts and washers
- Applicable engineering standards
Proper specification selection improves structural reliability and extends service life.
FAQ
1. What is a coach bolt?
A coach bolt, also known as a carriage bolt, features a smooth round head and a square neck that prevents rotation during installation.
2. What is the advantage of Dacromet coating?
Dacromet provides excellent corrosion resistance, outstanding weather resistance, and does not introduce hydrogen embrittlement, making it suitable for high-strength fasteners.
3. What is the difference between a coach bolt and a hex bolt?
A coach bolt has a round head with a square neck for anti-rotation installation, while a hex bolt uses a hexagonal head that requires a wrench for tightening.
4. Can custom sizes be manufactured?
Yes. Flybear provides OEM and ODM manufacturing for custom dimensions, thread lengths, coatings, head markings, and packaging.
5. How can I request a quotation?
Please provide the bolt size, strength grade, coating specification, quantity, drawings (if available), and application requirements for a detailed quotation.
The Dacromet carbon steel coach bolt combines high mechanical strength, exceptional corrosion resistance, and dependable anti-rotation performance, making it an ideal fastening solution for construction, infrastructure, and industrial engineering 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.
