Overview
Carriage bolts are specialized fasteners designed primarily for securing wood to metal or wood to wood, featuring a distinctive domed head with a square neck directly beneath it. This design prevents the bolt from turning once installed, allowing for easy tightening from the nut side. Manufactured through precision forging and threading processes, carriage bolts are typically made from high-grade steel, stainless steel, or galvanized materials to ensure durability and resistance to corrosion. Their smooth, rounded head provides a clean finish and reduces the risk of snagging or injury, making them ideal for applications where aesthetics and safety are important. The square neck locks into the wood or metal surface, providing a secure hold that withstands vibration and dynamic loads, which is essential in construction, furniture assembly, and outdoor structures.
The performance of carriage bolts is characterized by their ability to maintain strong clamping force and resist loosening under stress, making them suitable for heavy-duty applications such as decking, fencing, and automotive assembly. Their robust construction allows for use in environments exposed to moisture and varying temperatures without compromising structural integrity. Carriage bolts offer advantages including ease of installation, reliable fastening, and compatibility with various materials, which contributes to their widespread use in industrial and commercial projects. The combination of a smooth, rounded head and a locking square neck ensures that carriage bolts provide both functional strength and a neat appearance, meeting the rigorous demands of professional manufacturing and construction sectors.
| Product Type | Carriage Bolts |
| Head Style | Round, Domed Head with Square Neck |
| Manufacturing Process | Cold Forged |
| Thread Type | Coarse Thread (UNC) |
| Common Materials | Carbon Steel, Stainless Steel, Zinc-Plated Steel |
| Available Sizes | #6 to 1 inch diameter, Lengths from 1/2 inch to 6 inches |
| Strength Features | High Shear Strength, Square Neck Prevents Rotation |
| Typical Applications | Woodworking, Decking, Furniture Assembly, Structural Connections |
| Surface Finishes | Plain, Zinc Plated, Hot-Dip Galvanized |
| Standards | ASTM F1852, ASTM A307 |
| Customization | Custom Sizes, Materials, Threads & Surface Finishes Available |
Prevents bolt rotation during installation, ensuring a secure and stable fastening in wood and metal applications.
Available in stainless steel and coated carbon steel for enhanced durability in harsh environments.
Provides a finished appearance and reduces snagging or catching on materials or clothing.
Square neck locks into place, allowing quick and efficient assembly without the need for additional tools.
Suitable for structural, furniture, automotive, and agricultural fastening needs.
Alloy steel variants offer increased tensile strength for demanding industrial applications.
| Product Type | Carriage Bolts |
|---|---|
| Thread Type | Coarse Thread (UNC/Metric) |
| Diameter Range | M6 to M24 |
| Length Range | 20 mm to 150 mm |
| Available Materials | Stainless Steel, Carbon Steel, Alloy Steel |
| Manufacturing Standards | ASTM A307, DIN 603, ISO 8677 |
| Surface Finish | Plain, Zinc Plated, Hot-Dip Galvanized |
| Diameter (mm) | Length (mm) |
|---|---|
| M6 | 20, 30, 40, 50 |
| M8 | 25, 40, 50, 60 |
| M10 | 30, 50, 70, 90 |
| M12 | 40, 60, 80, 100 |
| M16 | 50, 80, 100, 120 |
| M24 | 80, 100, 120, 150 |
