M5/M6/M8 Carbon Steel Galvanized Carriage Screws Carriage Bolts Half Round Head Square Neck Screws Shelf Bridge Screws for Furniture Assembly & Structural Support

Our Carbon Steel Galvanized Carriage Bolts are professional, heavy-duty fasteners engineered for secure, long-lasting installations across furniture assembly, shelving, bridge construction, and structural support scenarios. Crafted from high-quality carbon steel with a galvanized finish, these bolts offer excellent corrosion resistance, rust prevention, and tensile strength, making them suitable for both indoor and outdoor use—even in humid or mild industrial environments.

 

Featuring a half-round head and square neck design, the bolts ensure a tight, anti-slip fit that prevents rotation during installation. The square neck locks securely into pre-drilled holes, providing stable fixation for shelves, furniture, bridges, and other structural components. Available in M5, M6, and M8 specifications, they meet standard industrial dimensions, compatible with nuts and washers for enhanced stability.

 

Widely applied in furniture assembly (such as bookshelves, cabinets), shelving installation, bridge maintenance, and general building projects, these carriage bolts are ideal for professional contractors, hardware manufacturers, and DIY enthusiasts. Each bolt undergoes strict quality control to ensure precise thread accuracy, smooth surface finish, and consistent performance, adhering to international fastener standards.

 

The galvanized coating not only boosts durability but also gives the bolts a clean, professional appearance. Whether used for bulk industrial projects, residential furniture assembly, or structural support, these carbon steel galvanized carriage bolts combine reliability, ease of installation, and cost-effectiveness—delivering consistent performance for all your fastening needs.