Carriage Bolt
Carriage Bolt (3/8"/1/2" diameter) is a hot-dip galvanized steel fastener with a rounded head and square neck, designed for utility pole and power infrastructure mounting.
• 3/8" diameter: Min tensile strength 3,500Kg, bolt lengths 3"–6-1/5", thread length 3/75", weights 6.30–9.20kg/100pcs, 150 pcs/carton.
• 1/2" diameter: Min tensile strength 3,500Kg, bolt lengths 4"–8", thread length 3/75"–4/100", weights 13.00–20.80kg/100pcs, 200 pcs/carton.
The square neck prevents rotation during installation, ideal for securing unthreaded structural components.
- Description
- Advantage
- Application
- Accessories
Our 3/8"/1/2" Carriage Bolt delivers 3,500Kg tensile strength for utility pole hardware mounting in power systems.

• Anti-rotation design: Square neck locks the bolt in place while tightening the nut, eliminating the need for a second wrench.
• Consistent tensile strength: 3,500Kg minimum strength for both diameters, meeting utility infrastructure load standards.
• Corrosion protection: Hot-dip galvanization complies with ISO/ASTM standards for outdoor use.
• Length versatility: 3"–8" bolt lengths fit diverse utility pole hardware mounting needs.
• Bulk packaging: 150/200 pcs/carton reduces shipping costs for large-scale projects.
• Utility pole hardware (mounting crossarms, insulators, and brackets to wooden/metal poles).
• Power distribution structural connections (fastening unthreaded steel components in substation infrastructure).
• Light industrial construction (securing metal/wooden frames in power equipment enclosures).
• Hex nuts/lock nuts (3/8"/1/2" diameter): For securing the bolt to mounted components.
• Lock washers: Prevent nut loosening under vibration from power line movement.
• Anti-corrosion grease: Lubricates threads for smooth nut installation and rust prevention.
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