S-90185A724 1/2"-13 x 3" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh environments.
• Exceptional tensile strength of 120,000 PSI (Grade 5) ensures reliable performance under heavy loads and vibrations.
• Effective anti-rotation locking provided by the integrated square neck, preventing loosening during assembly.
• Wide, rounded head design distributes clamping force evenly, reducing surface damage and improving safety.
• Coarse UNC threading allows for quick and easy installation, even in rough or dirty applications.
• Class 2A thread fit ensures consistent, precise engagement with standard nuts for secure fastening.
• Rockwell C25 hardness offers excellent durability and resistance to wear and deformation.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in heavy-duty applications. The square neck design securely locks into materials, eliminating rotation during tightening and providing reliable anti-rotation performance in wood, metal, and structural assemblies. With a fully threaded UNC coarse thread and Class 2A fit, it ensures fast, accurate installation in construction, machinery, and transportation equipment. The zinc plating adds a protective layer against rust, making it ideal for outdoor or high-moisture environments where long-term fastening integrity is critical.

Specification Summary & Compliance

This carriage bolt meets ASME B18.5 and SAE J429 specifications, with a Class 2A thread fit for precise dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for industrial use.