S-90185A591 5/16"-18 x 2" 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
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Exceptional mechanical strength with Grade 5 classification and 120,000 PSI tensile strength for heavy-duty applications
- Reliable anti-rotation performance through integrated square neck design that prevents spinning during installation
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
- Enhanced durability with Rockwell C25 hardness rating that maintains structural integrity under stress
- Versatile compatibility with fully threaded design accommodating various material thicknesses and joint configurations
- Rounded head profile provides smooth finish while distributing clamping force effectively
Professional Applications & Engineering Value
This Grade 5 carriage bolt delivers exceptional engineering value through its zinc-plated steel construction and precision UNC coarse threading. The integrated square neck design fundamentally solves the common industrial problem of fastener rotation during torque application, making it ideal for structural connections in wood-to-metal and heavy timber applications. The fully threaded configuration accommodates varying material thicknesses in construction, agricultural equipment, and trailer manufacturing. With 120,000 PSI tensile strength and Rockwell C25 hardness, this carriage bolt maintains clamping force under vibration and dynamic loads, preventing joint failure in machinery and structural frameworks where reliability is critical.
Specification Summary & Compliance
This carriage bolt features precision 5/16"-18 UNC coarse threading with Class 2A thread fit for consistent engagement. Manufacturing complies with ASME B18.5 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial and commercial applications.
