S-90185A241 3/8"-16 x 10" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that prevents the bolt from turning during installation and under vibration
• Exceptional tensile strength of 120,000 psi (Grade 5) for reliable performance in demanding structural and heavy-duty applications
• Enhanced corrosion resistance from zinc-plated steel construction, extending service life in various industrial environments
• Optimized thread engagement with Class 3A thread fit and UNC coarse threading, ensuring precise, secure fastening and easier assembly
• High material durability with Rockwell C25 hardness, providing excellent resistance to wear and deformation under load
• Secure partial threading design allows for unthreaded shank strength where needed while providing ample threaded section for nut engagement
• Rounded head profile offers a finished appearance and reduces risk of snagging, ideal for applications where safety and aesthetics matter

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The square neck design fundamentally solves rotation issues during torque application, making it ideal for wood-to-metal connections, structural framing, and heavy equipment assembly where traditional bolts might loosen. The UNC coarse threading provides faster installation and better performance in softer materials or where debris accumulation is a concern. With its 120,000 psi tensile strength and Rockwell C25 hardness, this fastener maintains clamp force under dynamic loads and impact, preventing joint failure in construction, transportation, and industrial machinery applications. The zinc plating offers essential corrosion protection for both indoor and outdoor environments, while the partially threaded configuration maximizes strength in the shank area.

Specification Summary & Compliance

This carriage bolt features precision 3/8"-16 UNC coarse threading with Class 3A thread fit for superior dimensional accuracy. Manufactured to meet ASME B18.5 and SAE J429 Grade 5 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.