S-90185A239 3/8"-16 x 8" 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 and Grade 5 classification, ideal for heavy-duty structural connections.
- Secure anti-rotation installation provided by the square neck design, preventing bolt spin during tightening in wood or metal applications.
- Superior corrosion resistance from zinc-plated steel construction, extending service life in demanding industrial environments.
- Precision threading for reliable engagement with UNC coarse 3/8"-16 threads and Class 3A fit, ensuring consistent performance in high-vibration settings.
- Optimized head design for flush mounting featuring a wide rounded carriage profile that distributes clamping force evenly.
- Enhanced mechanical durability with Rockwell C25 hardness, maintaining structural integrity under repeated stress.
- Full regulatory compliance meeting ASME B18.5, SAE J429 standards and RoHS 3/REACH environmental directives.
Professional Applications & Engineering Value
This Grade 5 carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The zinc-plated steel construction combats corrosion in outdoor construction, agricultural equipment, and material handling systems. Its fully threaded UNC coarse pattern enables rapid assembly in timber connections and structural steel framing, while the square neck eliminates rotation during nut tightening – a common failure point in dynamic load applications. The Class 3A thread fit maintains precise tolerances in high-cycle manufacturing environments, preventing loosening in conveyor systems and heavy machinery. With 120,000 psi tensile strength, it reliably secures critical joints in trailer beds, scaffolding, and industrial platforms where safety depends on fastener performance.
Specification Summary & Compliance
Manufactured to exacting ASME B18.5 and SAE J429 specifications with Class 3A thread tolerances for precision fit. The 3/8"-16 UNC coarse thread provides optimal engagement in various materials. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell C25 hardness and 120,000 psi tensile strength meeting Grade 5 requirements.
