S-90185A124 3/8"-16 x 2 1/4" 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 tensile strength with Grade 5 rating and 120,000 psi capacity for reliable performance in demanding applications
- Superior corrosion resistance through black-oxide steel construction, extending service life in harsh environments
- Enhanced durability with Rockwell C25 hardness rating, maintaining structural integrity under heavy loads
- Secure anti-rotation locking provided by the square neck design, preventing bolt spin during installation
- Optimized thread engagement through UNC coarse threading and Class 2A fit, ensuring consistent fastening performance
- Versatile installation capability with fully threaded design and right-hand direction for standard assembly procedures
- Wide-bearing surface from the rounded carriage head, distributing load effectively and reducing surface damage
Professional Applications & Engineering Value
These Grade 5 carriage bolts deliver critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The black-oxide steel construction provides essential corrosion protection in environments exposed to moisture and chemicals, while the square neck design prevents rotation during torque application, eliminating the need for secondary locking mechanisms. The UNC coarse threading ensures rapid installation and reliable performance in wood-to-metal and structural steel connections, making these carriage bolts ideal for construction, agricultural equipment, trailer manufacturing, and heavy machinery assembly. The combination of 120,000 psi tensile strength and Rockwell C25 hardness guarantees these fasteners maintain clamping force under dynamic loads and extreme conditions.
Specification Summary & Compliance
This 3/8"-16 carriage bolt features precise Class 2A thread fit with UNC coarse thread pattern and right-hand direction. Manufacturing complies with ASME B18.5 specifications SAE J429, ensuring dimensional accuracy and performance consistency. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) standards (01/17/2023 233 SVHC) for environmental safety, making it suitable for regulated industrial markets.
