S-92356A569 1/4"-20 x 7" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and outdoor applications
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
• Effective anti-rotation security due to the integrated square neck design that prevents spinning during installation
• Optimized threading efficiency with coarse UNC 1/4"-20 threads and Class 2A fit for faster assembly and reduced cross-threading risk
• Enhanced structural integrity from the wide, rounded carriage head that distributes load and resists pull-through
• Regulatory compliance assurance meeting ASME B18.5 standards and environmental directives (RoHS 3, REACH) for safe, approved use
• Versatile partial threading allowing unthreaded shank sections to bear shear loads while threaded portions secure nuts

Professional Applications & Engineering Value

This 1/4"-20 UNC carriage bolt delivers critical engineering solutions where vibration resistance, corrosion prevention, and structural reliability are paramount. The 18-8 Stainless Steel material inherently resists rust and chemical exposure, making it suitable for construction, marine, and industrial equipment exposed to moisture. The square neck design mechanically locks into wood or metal, eliminating rotation during torque application—saving installation time and preventing joint failure. With coarse threading and Class 2A thread fit, it ensures quick alignment and secure fastening in heavy-duty assemblies, from trailer beds to structural frameworks. Its partially threaded configuration provides an unthreaded bearing surface for enhanced shear strength, while the rounded carriage head offers a flush finish that minimizes snagging in conveyor systems or agricultural machinery.

Specification Summary & Compliance

This carriage bolt adheres to ASME B18.5 dimensional standards, with precise Class 2A thread fit for consistent mating with nuts. The UNC coarse thread (1/4"-20) and right-hand threading follow industry conventions, while the square neck (0.26" width, 0.16" length) ensures anti-rotational performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. The mechanical properties—including 70,000 psi tensile strength and Rockwell B55 hardness—validate its suitability for high-stress applications.