The DIN603 Carriage Bolt is a high-performance fastening solution engineered for applications requiring a smooth, domed head to prevent snagging and provide a professional aesthetic finish. Designed for durability and strength, these bolts are essential for construction, automotive, and industrial equipment where security and structural integrity are paramount.
Manufactured to rigorous DIN, ISO, GB, BS, and ASTM standards, our carriage bolts offer exceptional versatility with a wide range of sizes from M6 to M52. By utilizing premium carbon steel and advanced surface treatments, we ensure maximum corrosion resistance and mechanical reliability for the most demanding environments.
Detailed Parameters
| Size Range | M6-M52, 1/4”-2” | Grade | 4.8, 6.8, 8.8, 10.9, 12.9 |
|---|---|---|---|
| Material | Carbon Steel (Q235, 35k, 20MNTiB) | Standard | DIN, ISO, GB, BS, ASTM |
| Thread Type | Coarse, Fine, Half, Full Thread | Surface Treatment | Plain, Black, Zinc Plated, HDG, Dacromet |
| Quality Control | Raw Material, Production & Packing Tests | Certification | ISO9001, SGS |
| Service Mode | OEM/ODM/Customized | Packing | 25kg bag/carton + pallet |
Key Advantages
Certified Quality
Fully compliant with ROHS, ISO9001, and IATF16949 standards for global industrial acceptance.
Corrosion Resistance
Customizable salt spray testing from 2 to 1000 hours with detailed verification reports provided.
Precision Testing
100% full line testing system including Sclerometers, Hardness testers, and Image screening.
Custom Engineering
Complete OEM/ODM capabilities to manufacture fasteners according to your specific design requirements.
Strict QC Process
Triple-stage inspection: raw material testing, in-production checks, and pre-packing audits.
Competitive Pricing
Direct manufacturing efficiency allows us to offer highly competitive prices without compromising quality.
Product Gallery
Management Platforms
Material Sourcing
Strict selection of carbon steel Q235 and alloy steels to ensure base strength.
Precision Forging
Advanced cold/hot forging processes to achieve exact DIN603 dimensions.
Surface Coating
Automated plating lines for Zinc, HDG, and Dacromet for uniform protection.
Quality Auditing
Continuous monitoring via Calipers, Die gages, and Projectors for zero-defect output.
Logistics Control
Standardized 25kg packing with palletization for safe international transit.
Client Customization
Dedicated OEM portal for managing customized drawings and sample approvals.
Investment Return Comparison
| Metric | Standard Fasteners | Our Premium DIN603 |
|---|---|---|
| Service Life | Short-term/Standard | Extended via HDG/Dacromet |
| Failure Rate | Moderate | Ultra-low (100% Tested) |
| Installation Speed | Standard | Faster (Precision Threading) |
| Maintenance Cost | Frequent Replacement | Minimal long-term cost |
| Compliance | Basic | Full ISO/IATF Certification |
Frequently Asked Questions
DIN603 specifies the dimensions and tolerances for carriage bolts with a square neck under the head, providing a secure fit that prevents the bolt from turning during tightening.
For high-corrosion environments, we recommend Hot Dip Galvanized (HDG) or Dacromet coatings, which offer superior salt spray resistance up to 1000 hours.
Yes, we offer full OEM/ODM services. We can manufacture customized lengths and grades according to your specific technical drawings.
We conduct rigorous raw material testing and utilize hardness testers and sclerometers to verify that the grade (4.8 to 12.9) meets the required specifications.
Absolutely. We provide ISO9001 and SGS certifications, along with specific salt spray checking reports upon request.
Lead times vary by size and quantity, but our efficient production lines and strict management ensure timely delivery. Contact us for a specific quote.
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