S-90185A822 5/8"-11 x 3 1/2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under heavy loads, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from zinc-plated steel construction extends service life and maintains integrity in harsh industrial or outdoor environments.
• Effective anti-rotation design with a square neck that locks securely into materials, preventing loosening under vibration and dynamic stress.
• Wide, rounded head profile distributes clamping force evenly, minimizing surface damage and providing a secure, flush fit in wood or metal assemblies.
• Coarse UNC threading allows for faster installation and easier alignment, saving time and labor in construction and machinery setups.
• Precision Class 2A thread fit ensures consistent engagement and smooth assembly, reducing the chance of cross-threading and improving operational efficiency.
• High hardness rating (Rockwell C25) enhances durability and wear resistance, supporting long-term use in high-stress applications.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address common challenges in heavy-duty industrial and construction settings, such as vibration-induced loosening and corrosion. The square neck design integrates seamlessly into pre-drilled holes, providing a firm, non-rotational grip that is critical for structural stability in machinery, trailer assemblies, and wooden frameworks. Its fully threaded UNC coarse thread facilitates quick installation and robust holding power, while the zinc plating offers a protective barrier against rust and environmental wear. Ideal for applications requiring high tensile strength and compliance with rigorous standards, this bolt ensures reliable performance in bridges, agricultural equipment, and building infrastructures, minimizing maintenance needs and enhancing safety.

Specification Summary & Compliance

This carriage bolt features a 5/8"-11 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and ease of assembly. Manufactured in accordance with ASME B18.5 and SAE J429 specifications, it meets Grade 5 requirements for strength and durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and adherence to international standards for industrial fasteners.