S-92356A146 5/16"-18 x 5 1/2" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior Corrosion Resistance - 18-8 Stainless Steel construction ensures long-term reliability in harsh or outdoor environments, reducing maintenance costs
• Maximum Anti-Rotation Security - Square neck design prevents bolt spinning during installation and under vibration, providing stable fastening performance
• Heavy-Duty Load Capacity - 70,000 psi tensile strength and Rockwell B55 hardness withstand extreme mechanical stresses in demanding applications
• Enhanced Installation Efficiency - Class 2A thread fit and UNC coarse threading enable quick assembly while maintaining precise engagement
• Regulatory Compliance Assurance - Meets ASME B18.5 specifications and environmental standards (RoHS 3, REACH) for global project acceptance
• Versatile Full Threading - Fully threaded design accommodates various material thicknesses and allows for adjustable positioning
• Optimized Head Design - Rounded carriage head with wide profile distributes clamping force evenly and provides a finished appearance

Professional Applications & Engineering Value

This 5/16"-18 UNC carriage bolt delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The 18-8 stainless steel composition combined with the square neck design addresses common industrial challenges of fastener loosening and material degradation in outdoor structures, agricultural equipment, and marine applications. The fully threaded configuration provides flexibility for varying material thicknesses in construction and manufacturing assemblies, while the coarse UNC threading ensures rapid installation in wood, metal, and composite materials. With its 70,000 psi tensile strength, this heavy-duty fastener maintains structural integrity in high-stress connections, making it ideal for trailer manufacturing, fencing systems, and industrial machinery where reliable, long-term performance is essential.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances with 5/16"-18 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.5 standards for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in regulated industries. Critical dimensions include 5-1/2" length, 0.719" head diameter, and 0.32" square neck width for consistent anti-rotation performance across applications.