When your project demands a fastener that combines a smooth, finished appearance with unyielding strength, look no further than the Buyers Products 3010739 Grade 5 Carriage Bolt. Engineered for reliability in demanding environments, this 3-1/2 inch bolt is a crucial component for heavy-duty assembly and repair. Whether you are constructing a new trailer bed, repairing agricultural machinery, or undertaking a significant structural project, this bolt provides the secure, lasting connection you need. Trust in the quality and performance that Buyers Products is known for to hold your most critical connections together with confidence.
The exceptional performance of this carriage bolt begins with its Grade 5 carbon steel construction. This specific grade of steel is heat-treated, quenched, and tempered to achieve a superior tensile strength, making it significantly stronger and more durable than standard Grade 2 or un-graded bolts. This enhanced strength is essential for applications subjected to high stress, vibration, and heavy loads. To protect this strength from the elements, the bolt features a zinc-plated finish, providing a robust layer of corrosion and abrasion resistance. This protective coating ensures long-term reliability, even when exposed to moisture, road salt, and harsh working conditions, preventing rust and preserving the integrity of the fastener.
Designed with both function and form in mind, the carriage bolt features a smooth, low-profile domed head that provides a safe, snag-free surface, making it ideal for applications where exposed bolt heads are a concern. The most critical design feature is the square neck located directly beneath the head. When installed in a square or round hole in wood or a square hole in metal, this neck locks the bolt in place, preventing it from spinning as the nut is tightened. This allows for a simple, one-tool installation from the nut side, saving you time and effort. Its versatility makes it an indispensable piece of hardware for trailer manufacturing, dock building, playground equipment assembly, and countless other Uncategorized fastening jobs where strength and a clean finish are paramount.
- Part Number: 3010739
- Grade: Grade 5
- Material: High-Strength Carbon Steel
- Finish: Zinc Plated for Superior Corrosion Resistance
- Bolt Type: Carriage Bolt
- Head Style: Round / Domed
- Neck Style: Square
- Diameter: 5/8″
- Thread Pitch: 11 TPI (Coarse – UNC)
- Length: 3.50″ (3-1/2″)
- Application: Ideal for fastening wood to metal or wood to wood in high-stress environments.





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