S-93604A689 3/8"-16 x 5" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ensuring long-lasting performance in harsh outdoor or industrial environments.
• Excellent anti-rotation security due to the integrated square neck design, which locks securely into materials to prevent spinning during installation.
• High tensile strength of 60,000 psi and Grade 2 classification for reliable load-bearing capacity in demanding construction and industrial applications.
• Easy, quick installation with fully threaded UNC coarse threading and right-hand direction, allowing for efficient assembly without specialized tools.
• Wide-rounded head profile provides a larger bearing surface, distributing pressure evenly and reducing the risk of material damage.
• Consistent dimensional accuracy with Class 2A thread fit, ensuring precise compatibility and smooth engagement with standard nuts.
• Compliance with major industry standards including ASTM A307, ASTM A153, and ASME B18.5, guaranteeing quality and interoperability.

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt is engineered to address common challenges in industrial and construction applications, such as corrosion from weather exposure and rotational failure under stress. The square neck design effectively counters torque, making it ideal for wood-to-metal connections in structural frameworks, machinery assembly, and outdoor fixtures. With a Rockwell B70 hardness and Grade 2 strength, it withstands high-vibration environments without compromising integrity. The fully threaded UNC coarse thread ensures rapid installation and strong holding power, while the galvanized coating extends service life by resisting rust, reducing maintenance costs and downtime in commercial projects.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent engagement and UNC coarse threading (3/8"-16) per standard specifications. It meets manufacturing standards such as ASTM A307, ASTM A153, and ASME B18.5, ensuring reliability in mechanical and structural uses. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and safe handling in global supply chains.