High Streagth Round Head Square Neck All Thread Carriage Bolts Direct from Factory in Hebei China

High-strength round head square neck carriage bolts with full threading, designed for secure fastening in wood and metal applications. The square neck prevents rotation during installation, ensuring reliable performance in construction and utility projects.

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Jiujin Electric Power’s High-Strength Round Head Square Neck Carriage Bolts are engineered for durability and ease of installation in demanding environments. Forged from high-tensile carbon steel and finished with a robust hot-dip galvanized coating, these bolts offer exceptional resistance to corrosion, shear forces, and vibrational loosening. The round head provides a smooth finish for safety, while the square neck locks into wood or metal surfaces to prevent spinning during nut tightening. Full threading allows for adjustable grip length, making these bolts versatile for various thicknesses of materials. Manufactured in our Hebei facility under strict quality control, these bolts meet international standards for structural and utility applications, ensuring long-term reliability.

   Varieties & Types Table

Feature / Type Specifications & Options Available by Jiujin Electric Power
Model/Type CB-10, CB-12, CB-16 (Denotes thread diameter in mm)
Material High-Tensile Carbon Steel (Grade 4.8, 8.8, or Q235B)
Standard Complies with ASTM A307, ISO 7378, and GB/T 12
Coating/Finish Hot-Dip Galvanized (Minimum coating thickness: 55µm)
Size / Dimensions Thread diameters: M10, M12, M16; Lengths: 50mm–300mm
Load Rating 10 kN (M10), 16 kN (M12), 30 kN (M16)
Packaging Bulk packaging with nuts/washers; cartons or wooden crates

  Applications of Use

  • Wooden Structure Fastening: Securing timber in construction, fencing, and furniture

  • Utility Pole Hardware: Attaching crossarms, brackets, and equipment to poles

  • Metal Fabrication: Joining metal frames, machinery, and structural components

  • Railway Tracks: Fastening rails to sleepers and infrastructure components

  • Agricultural Equipment: Assembling machinery and storage structures

  • Temporary Installations: Quick and reliable fastening for temporary setups

  • Renewable Energy Projects: Mounting solar panels and wind turbine components