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Carriage Bolt
This product features a semi-circular head, square neck, and full/semi-threaded construction. It is cold-forged, with the square neck embedding into the workpiece groove to prevent bolt rotation. The semi-circular head is aesthetically pleasing, the threads are precise, and the connection is secure. It is suitable for both wood and steel structures. The full range covers mainstream systems, and stock is readily available. Surface treatments include hot-dip galvanizing and zinc plating for rust prevention. It undergoes quality control, complies with environmental regulations, and compliance documentation can be provided. Non-standard customization is supported, and it is suitable for anti-rotation connection scenarios.
- Executive Standard
- Specification Range
- Grade & Strength
- Common Materials
- Surface Treatment
- Surface Treatment
- Industry Classification
GB/T 14; ISO 8677; DIN 603; ANSI/ASME B18.5.1
Metric: Thread M3~M24, length 10mm~150mm, square neck width 4mm~25mm, semi-circular head diameter 6mm~30mm; Imperial: Thread #6-32~1"-8, length 3/8"~6", square neck width 3/16"~1"
Carbon steel grades 4.8, 6.8, and 8.8; stainless steel grades A2-50, A2-70, A4-70, and A4-80; non-ferrous metals grade not lower than 4.8.
High-quality low-carbon steel, medium-carbon steel, alloy steel, 304 stainless steel, 316 stainless steel, brass, aluminum alloy, etc.
Environmentally friendly blue-white zinc, colored zinc, black zinc, environmentally friendly nickel plating, zinc-nickel alloy plating, Dacromet coating, electrophoresis, PVD, stainless steel natural color, stainless steel passivation, etc.
For applications such as timber structures, steel structures, agricultural machinery, and outdoor facilities, the core adaptation is to prevent bolt rotation during connection scenarios. The square neck is embedded in the workpiece to avoid slippage when tightening.
Do you need non-standard fasteners, precision metal parts, or custom structural components for a specific application?
Yongji helps you develop and manufacture special parts and custom products based on your drawings, samples, technical requirements, and target application scenarios.
Whether you need prototype quantities, pilot production, or stable mass supply, we provide an integrated solution from engineering review to production and delivery.
From fasteners to structural parts, Yongji offers integrated development and manufacturing for a wide range of custom precision hardware products.
Whether you need a few pieces for validation, small batches for development, or large volumes for mass production, we can support your project at different stages.
With integrated manufacturing resources in China and Vietnam, Yongji helps customers achieve stable quality, scalable production, and reliable delivery.
Yongji Precision Hardware is a global manufacturer specializing in precision fasteners and metal structural components. We are China Carriage Bolt Suppliers and Wholesale Carriage BoltExporter && Company. Founded in 2003, the company has over two decades of experience serving international OEM and ODM customers across multiple industries.
With integrated manufacturing capabilities including cold heading, stamping, CNC machining and sheet metal fabrication...
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