S-90185A621 3/8"-16 x 3/4" ASME B18.5, SAE J429 Carriage Bolts
Carriage Bolts
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Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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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 through zinc-plated steel construction, extending service life in harsh environments
- Secure anti-rotation locking with integrated 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 rating that maintains structural integrity under stress
- Wide-bearing surface from the rounded carriage head design that distributes clamping force evenly
- Industry-standard compatibility meeting ASME B18.5 specifications for consistent performance across applications
Professional Applications & Engineering Value
This Grade 5 carriage bolt delivers critical engineering solutions for industrial assembly challenges. The zinc-plated steel construction provides essential corrosion protection in outdoor equipment, agricultural machinery, and structural frameworks where environmental exposure compromises fastener integrity. The square neck design eliminates rotational movement during torque application, ensuring secure fastening in wood-to-metal connections and structural timber applications. With fully threaded UNC coarse threading, installation efficiency is maximized while maintaining Class 2A thread fit precision. The combination of 120,000 psi tensile strength and Rockwell C25 hardness makes this carriage bolt ideal for heavy-duty applications requiring reliable clamping force without deformation, from trailer manufacturing to industrial platform construction.
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. Manufactured to ASME B18.5 standards and SAE J429 Grade 5 specifications, it ensures consistent dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions and REACH (EC 1907/2006) regulations, meeting current environmental and safety requirements for industrial fastener applications.
