S-90185A161 1/4"-20 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-flake coating for extended service life in harsh industrial environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength for demanding structural applications
• Secure anti-rotation locking provided by the square neck design that prevents spinning during installation
• Optimized thread engagement with Class 2A UNC coarse threads for faster assembly and reduced cross-threading risk
• Enhanced durability with Rockwell C25 hardness that maintains structural integrity under heavy loads
• Reliable performance compliance meeting ASME B18.5 and SAE J429 standards for quality assurance
• Environmental regulation adherence with RoHS 3 and REACH compliance for global industrial use

Professional Applications & Engineering Value

These Grade 5 carriage bolts with zinc-flake coated steel construction address critical industrial fastening challenges where corrosion resistance and structural integrity are paramount. The fully threaded UNC coarse thread design ensures rapid installation in wood-to-metal and structural steel applications, while the square neck provides positive locking against rotation during torque application. With 120,000 psi tensile strength and Rockwell C25 hardness, these bolts maintain clamping force in vibrating machinery, construction equipment, and transportation applications where heavy duty carriage bolts must withstand dynamic loads without compromising joint security.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and 1/4"-20 UNC coarse thread specifications. These carriage bolts comply with ASME B18.5 and SAE J429 Grade 5 requirements, ensuring dimensional accuracy and mechanical properties. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, making them suitable for regulated industrial markets worldwide.