Bulk 1/2"-13 Carriage Bolts A307 Grade A Coarse HDG

Durable, Corrosion-Resistant Fasteners for Secure Connections in Harsh Environments

Enhance your construction, woodworking, and outdoor projects with our premium 1/2"-13 Carriage Bolts, crafted from A307 Grade A steel and coated with Hot Dipped Galvanized (HDG) Zinc. These bolts offer dependable strength and corrosion resistance, making them perfect for a variety of applications where durability is essential.

Carriage bolts feature a smooth, domed head with a square neck beneath. This design self-locks into a pre-drilled hole, preventing rotation as the nut is tightened from the opposite side. Ideal for wood-to-wood, wood-to-metal, and even some metal-to-metal applications, carriage bolts are commonly used in carpentry, fencing, decking, furniture assembly, and projects requiring tamper-resistant connections.

Undersized Threads for HDG Fasteners

Some bolt lengths in this product line are undersized to compensate for the zinc coating added during the galvanizing process. Because the zinc layer increases the diameter of the threads, starting with an undersized thread ensures the final dimension after galvanizing matches standard thread sizes. Not all lengths will be undersized—please refer to the variation details for specific undersized lengths.

• Compensation for Zinc Buildup: The added zinc layer thickens the threads. By undersizing initially, the final coated threads fit standard nuts perfectly.
• Proper Fit with Nuts: Undersizing prevents overly tight threads after galvanizing, making nut installation smooth and efficient.
• Important for Design: Specifying undersized HDG fasteners ensures proper functionality and ease of installation in your project.

Key Benefits of Our HDG Carriage Bolts

• Enhanced Corrosion Resistance: Hot Dipped Galvanizing provides excellent protection against rust, pitting, and corrosion, ideal for outdoor and industrial environments.
• Self-Locking Square Neck: The square neck keeps the bolt from spinning, ensuring a secure and stable connection.
• Flush, Clean Appearance: The domed head sits flush, reducing snagging and offering a professional, polished look.
• Easy Installation: Just tap the bolt into place and tighten the nut—no twisting of the bolt head required.
• Tamper-Resistant: The smooth head design means removal is only possible from the nut side, enhancing security.

Why Choose Our Bulk Carriage Bolts?

• Bulk Discounts: Save with volume pricing, ideal for contractors and large-scale projects.
• Wholesale Availability: Perfect for B2B customers needing significant quantities.
• High-Quality Material: A307 Grade A steel with HDG coating ensures robust durability and corrosion resistance.
• Versatile Use: Suitable for woodworking, fencing, decking, furniture assembly, light construction, and more.

Product Specifications

• Diameter: 1/2"
• Thread Pitch: 13 TPI (Coarse Thread)
• Length: Measured from under the head to the end of the shank
• Head Style: Domed (Round) Head with Square Neck
• Material: A307 Grade A Steel
• Coating: Hot Dipped Galvanized (HDG) Zinc for enhanced corrosion resistance
• Undersized Option: Certain lengths are undersized to ensure proper fit post-galvanizing (see variation details)
• Standards Compliance: Conforms to standard carriage bolt dimensions (ASME B18.5 or equivalent)

Ideal Applications

• Woodworking Projects: Ideal for cabinetry, furniture assembly, and wooden walkways.
• Construction: Perfect for fencing, decking, and structural wood connections.
• Outdoor Installations: Suitable for playground equipment, garden structures, and other exterior projects.
• General Assembly: Great for DIY and professional builds needing dependable, tamper-resistant hardware.
• Industrial Applications: Suitable for environments exposed to moisture and corrosive agents.

Complementary Products

• Matching Nuts: (Add link to 1/2"-13 A307 Grade A HDG Nuts if available)
• Matching Washers: (Add link to 1/2"-13 A307 Grade A HDG Washers if available)

Buy in Bulk and Build with Confidence

Trust our 1/2"-13 Carriage Bolts to provide secure, long-lasting connections in demanding environments. With bulk and wholesale pricing, Monster Bolts delivers top-quality HDG fasteners—available in both standard and undersized thread options—to meet your project needs, backed by exceptional customer service.

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