S-92356A589 5/16"-18 x 1 1/4" 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 anti-rotation performance thanks to the square neck design that prevents spinning during installation and use
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity for demanding industrial applications
• Rockwell B55 hardness provides excellent durability and resistance to deformation under stress
• Wide rounded head profile offers enhanced bearing surface and prevents pull-through in softer materials
• Fully threaded UNC coarse thread design allows for maximum engagement and faster installation in various materials
• Compliance with major industry standards including ASME B18.5, RoHS 3, and REACH for quality assurance and environmental safety

Professional Applications & Engineering Value

This 5/16"-18 UNC carriage bolt delivers exceptional engineering value through its 18-8 stainless steel composition and specialized design features. The square neck mechanism provides critical anti-rotation capability, solving the common problem of bolt spinning during torque application in wood-to-metal and structural connections. The fully threaded coarse UNC thread pattern ensures rapid installation while maintaining strong holding power in timber, construction frameworks, and machinery assemblies. The wide rounded head distributes clamping force effectively, preventing material damage in soft substrates. These features make it particularly valuable for industrial applications requiring reliable, corrosion-resistant fastening solutions in challenging environments where vibration resistance and long-term performance are paramount.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerance for consistent performance across applications. Manufactured to ASME B18.5 specifications, it features 5/16"-18 UNC coarse threads with right-hand direction and full threading. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while meeting international quality standards for dimensional accuracy and material properties.