S-90185A236 3/8"-16 x 6 1/2" 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 anti-rotation performance with a square neck design that securely locks into materials, preventing bolt spin during installation and under vibration.
- Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Enhanced corrosion resistance provided by zinc plating, extending the bolt's service life in demanding industrial environments.
- Optimized for quick installation with fully threaded UNC coarse spacing, allowing for faster assembly and disassembly in maintenance scenarios.
- High thread reliability with Class 3A fit, ensuring precise engagement and consistent clamping force in critical connections.
- Durable material construction featuring Grade 5 steel with Rockwell C25 hardness, offering excellent wear resistance and long-term durability.
- Wide-rounded head profile distributes clamping force evenly, minimizing surface damage and providing a secure, flush finish.
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial fastening challenges, such as joint loosening under dynamic loads and corrosion in harsh environments. The square neck design is critical for anti-rotation, making it ideal for wood-to-metal connections in construction, agricultural machinery, and transportation equipment where vibration resistance is paramount. The fully threaded UNC coarse thread facilitates rapid assembly in structural frameworks and heavy-duty trailers, while the zinc plating ensures longevity against moisture and chemicals. With a 120,000 psi tensile strength and Rockwell C25 hardness, it provides reliable performance in high-stress applications, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This carriage bolt adheres to ASME B18.5 and SAE J429 standards, ensuring dimensional accuracy and mechanical properties. The UNC 3/8"-16 thread features a Class 3A fit for precise tolerance, and the bolt is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material sustainability in industrial use.
