S-93180A320 5/16"-18 x 1" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength to withstand heavy loads and stress
• Reliable anti-rotation performance through integrated square neck design that prevents spinning during installation
• Optimized thread engagement with UNC coarse threading for faster assembly and reduced cross-threading risks
• Enhanced durability with Rockwell B55 hardness rating for superior wear resistance
• Wide bearing surface from rounded carriage head design for improved load distribution
• Full thread coverage along the entire 1" length for maximum fastening flexibility

Professional Applications & Engineering Value

These 316 stainless steel carriage bolts deliver critical performance advantages in demanding industrial applications where corrosion resistance and structural integrity are paramount. The combination of marine-grade 316 stainless steel and UNC coarse threading makes these fasteners ideal for structural connections in chemical processing equipment, marine hardware, food processing machinery, and outdoor infrastructure. The square neck design provides essential anti-rotation capability during torque application, eliminating the need for secondary locking mechanisms and reducing installation time. With 70,000 psi tensile strength and Rockwell B55 hardness, these carriage bolts maintain clamping force under vibration and dynamic loading conditions, preventing joint failure in critical assemblies.

Specification Summary & Compliance

This 5/16"-18 UNC carriage bolt features Class 2A thread fit tolerance for consistent engagement and meets ASME B18.5 dimensional specifications. The fastener is fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions. Manufacturing follows standardized inch system measurements with precise dimensional control including 0.719" head diameter, 0.176" head height, and 0.32" square neck width to ensure compatibility with standard installation tools and procedures.