S-90185A172 5/16"-18 x 1 3/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-flake coating that provides long-lasting protection in harsh industrial environments
• Exceptional load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for demanding applications
• Secure anti-rotation performance thanks to the square neck design that prevents spinning during installation
• Reliable coarse threading with UNC Class 2A fit ensuring easy assembly and vibration resistance
• Enhanced durability with Rockwell C25 hardness maintaining structural integrity under repeated stress
• Wide compatibility with rounded carriage head profile accommodating various industrial fastening requirements
• Regulatory compliance meeting ASME B18.5, SAE J429, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers exceptional engineering value through its zinc-flake coated steel construction, specifically designed to address common industrial fastening challenges. The combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures reliable performance in heavy-duty applications where structural integrity is critical. The square neck design effectively prevents rotation during torque application, solving installation frustrations in machinery, structural steel, and transportation equipment. The UNC coarse threading with Class 2A fit provides superior engagement in wood, metal, and composite materials, while the zinc-flake coating offers enhanced corrosion resistance for extended service life in demanding environments. These features make it ideal for construction, agricultural equipment, and industrial machinery applications requiring high-strength fasteners with consistent performance.

Specification Summary & Compliance

This carriage bolt features precise 5/16"-18 UNC coarse threading with Class 2A tolerance for consistent fit and performance. Manufactured to ASME B18.5 and SAE J429 Grade 5 specifications, it ensures dimensional accuracy and mechanical properties. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for regulated industrial markets. With complete threading and right-hand thread direction, it delivers reliable fastening performance across various industrial applications.