S-98060A850 3/8"-16 x 2" 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, extending service life in demanding environments
- Enhanced anti-rotation performance due to the knurled neck design, preventing loosening under vibration
- High tensile strength of 120,000 psi (Grade 5) ensures reliable load-bearing capacity for structural applications
- Wide, rounded carriage head provides a finished appearance and prevents pull-through in wood and soft materials
- Coarse UNC threading (3/8"-16) enables faster installation and reduced cross-threading risks
- Class 2A thread fit guarantees consistent assembly with standard nuts while maintaining clearance
- Partial threading allows for secure clamping where unthreaded shank bears against materials
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial challenges such as joint integrity and environmental durability. The knurled neck beneath the rounded head bites into materials, effectively resisting rotation during torque application—ideal for wood-to-metal connections in construction, agricultural equipment, and trailer assemblies. Its UNC coarse thread ensures quick engagement and reduced installation time, while the zinc plating provides a protective barrier against rust and corrosion in outdoor or high-moisture settings. With a Rockwell C25 hardness and 120,000 psi tensile strength, it maintains structural stability under dynamic loads, making it a trusted choice for heavy-duty frameworks and machinery where vibration resistance is critical.
Specification Summary & Compliance
This carriage bolt adheres to SAE J429 specifications for mechanical properties and dimensional consistency. Threading conforms to UNC 3/8"-16 with Class 2A tolerance, ensuring compatibility with standard nuts. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances. Manufactured from zinc-plated steel, it meets the defined hardness (Rockwell C25) and tensile strength (120,000 psi) requirements for Grade 5 fasteners.
