S-90185A624 3/8"-16 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional mechanical strength with Grade 5 rating and 120,000 psi tensile strength for heavy-duty applications
• Reliable anti-rotation performance through integrated square neck design that prevents spinning during installation
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
• Enhanced durability with Rockwell C25 hardness that maintains structural integrity under repeated stress
• Versatile rounded head profile with wide bearing surface for improved load distribution and aesthetic applications
• Full regulatory compliance meeting ASME B18.5, SAE J429 standards plus RoHS 3 and REACH environmental requirements

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The square neck design mechanically locks into mating materials, eliminating rotation during torque application - a common failure point in dynamic loading environments. The UNC coarse thread configuration ensures rapid installation in wood, metal, and composite materials while maintaining Class 2A thread fit precision. With 120,000 psi tensile strength and corrosion-resistant zinc plating, this fastener withstands harsh operating conditions in construction, agricultural equipment, transportation infrastructure, and machinery assembly. The combination of Rockwell C25 hardness and full threading provides consistent performance where shear strength and fatigue resistance are critical design considerations.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances with UNC coarse threading (3/8"-16) and full thread coverage along the 1" length. Manufacturing conforms to ASME B18.5 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The square neck measures 0.39" width with 0.22" length for secure anti-rotation performance in standard applications.