Hebei Kappa Metal Products Co., Ltd. is one of the most reliable manufacturers and suppliers of high-strength carriage bolts grade 8.8 with zinc plating in China. Welcome to buy bulk high quality high-strength carriage bolts grade 8.8 with zinc plating made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
High-strength Carriage Bolts Grade 8.8 with Zinc Plating
Description
|
Item |
Carriage bolts |
|
Standard |
DIN603 |
|
Material |
Carbon steel |
|
Finish/Surface treatment |
Zinc Plating |
|
Thread |
UNC |
|
Thread pitch |
0.8mm/1.5mm/2mm |
|
Trade terms |
EXW/FCA/FOB |
|
Payment terms |
30% T/T as deposit,70%balance before delivery |
|
Payment methods |
Bank account/Ali pay Qr code/ Western Union.... |
High-strength Carriage Bolts Grade 8.8 with Zinc Plating
Strength Guarantee
Grade 8.8 High-Strength Performance – Heat-treated medium-carbon steel delivers a tensile strength of ≥ 800 MPa and yield strength of ≥ 640 MPa, providing twice the strength of ordinary Grade 4.8 fasteners. This superior mechanical property ensures your structures remain secure under heavy static and dynamic loads.
Surface Treatment Options
Superior Corrosion Protection for Harsh Environments
Choose the finish that fits your application:
Galvanized (Zinc Plated) – Standard corrosion resistance for general indoor and covered outdoor use.
Zinc-Nickel Alloy Coating – Premium protection offering 480 to 720 hours salt spray resistance (ASTM B117 compliant), specially engineered for outdoor installations, coastal regions, high-humidity environments, and chemical-exposed conditions.
Note: Salt spray test duration can be customized up to 720 hours upon request.
Standard Compliance & Precision
DIN 603 / GB / ANSI Compliant – Precision-manufactured to rigorous German dimensional standards, with thread accuracy held to 6g tolerance class for consistent fit, reliable torque control, and trouble-free installation with standard nuts and washers. Available in both metric and inch series to suit global market requirements.
Key Applications
| Application | Why Carriage Bolt ? |
|---|---|
| Timber Framing & Wood Structures | Smooth domed head provides a clean, aesthetically pleasing finish without marking or embedding into the wood surface. Square neck prevents spinning during installation. High strength handles heavy roof loads, beam connections, and post-to-base joints. |
| Industrial Shelving & Racking Systems | Vibration-resistant design prevents loosening over time. Single-side operation allows easy installation in confined spaces where access is limited to one side only. |
| Bridge Engineering | High shear and tensile strength support structural connections. Enhanced coating options ensure long-term corrosion resistance in exposed environments. |
| Vehicle Platforms & Trailers | Secure fastening for decking, ramps, and structural members, with anti-loosening performance under road vibration. |
| Outdoor Facilities | Playground equipment, fencing, agricultural buildings, and boardwalks benefit from the combination of aesthetic round head and weather-resistant coating options. |
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