A carriage bolt is a classic fastener engineered for anti-rotation and anti-loosening applications. Its distinctive round head and square neck design locks into pre-drilled holes or slots, preventing self-rotation during assembly without the need for additional tools. Widely used in fences, guardrails, truck bodies, shelving, and outdoor equipment.
Carriage bolts are typically manufactured from carbon steel or stainless steel, with surface treatment options including hot-dip galvanizing, electro-galvanizing, and Dacromet coating to meet corrosion resistance requirements across various environments.
The square neck engages directly with the mating material to provide anti-rotation, while a nut completes the clamping force. This makes carriage bolts especially suited for flush-surface assemblies where a concealed head is required — delivering both structural integrity and a clean finished appearance.
Produced in accordance with GB/T 12, DIN 603, and other recognized standards, carriage bolts undergo strict quality control over head dimensions, square neck hardness, and thread accuracy. This ensures reliable, stable connections under vibration and impact conditions, making them an essential fastener for outdoor construction and light structural assembly.
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