S-90185A139 1/2"-13 x 1 3/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide Steel finish, extending service life in demanding industrial environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength and Grade 5 classification for reliable performance in heavy-duty applications
• Secure anti-rotation installation thanks to the square neck design that prevents spinning during tightening
• Optimized thread engagement with UNC coarse spacing and Class 2A thread fit for faster assembly and consistent clamping force
• Enhanced durability with Rockwell C25 hardness, maintaining structural integrity under repeated stress
• Wide-rounded head profile provides increased bearing surface for better load distribution and reduced surface damage
• Full threading ensures maximum grip length and versatility across various material thicknesses

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 5 Carriage Bolts deliver exceptional performance in construction, machinery assembly, and structural frameworks. The Black-Oxide Steel construction provides superior corrosion resistance in harsh environments, while the square neck design eliminates the need for additional anti-rotation components, streamlining installation and reducing labor costs. The fully threaded UNC coarse spacing ensures rapid assembly and reliable performance in wood-to-metal and structural connections. With 120,000 psi tensile strength and Rockwell C25 hardness, these bolts maintain integrity under vibration and dynamic loads, making them ideal for agricultural equipment, trailer manufacturing, and industrial machinery where anti-rotation security and long-term reliability are critical.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing (1/2"-13) for consistent performance. Complies with ASME B18.5 specifications and SAE J429 Grade 5 requirements for mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. Right-hand threaded with full threading and square neck dimensions (0.28" length, 0.52" width) ensuring proper anti-rotation function in standard applications.