S-90185A189 3/8"-16 x 6" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh industrial environments
• Secure anti-rotation design with square neck that prevents spinning during installation and maintenance
• Optimized thread engagement through UNC coarse threading ensures faster assembly and reduced cross-threading risks
• Enhanced durability with Rockwell C25 hardness maintains structural integrity under repeated stress
• Wide compatibility with Class 2A thread fit guarantees consistent performance across standard industrial equipment
• Regulatory compliance meets critical industry standards including ASME B18.5 and SAE J429 specifications

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers critical engineering solutions for industrial assembly challenges. The zinc-flake coated steel construction provides exceptional corrosion protection in outdoor equipment, agricultural machinery, and structural frameworks where environmental exposure compromises fastener integrity. The square neck design positively locks into mating materials, eliminating rotation during torque application - particularly valuable in wood-to-metal connections and conveyor system maintenance. With fully threaded UNC coarse threading, installation efficiency improves significantly while maintaining 120,000 psi tensile strength for heavy-load applications including trailer manufacturing, construction equipment, and industrial platform assembly. The combination of Rockwell C25 hardness and precise Class 2A thread fit ensures consistent performance in vibration-prone environments where fastener loosening poses operational risks.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances with UNC 3/8"-16 coarse threading and right-hand thread direction. Manufacturing conforms to ASME B18.5 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances above threshold limits.