S-90185A251 1/2"-13 x 8 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 corrosion resistance with zinc-plated steel construction, extending service life in demanding environments.
- Exceptional tensile strength of 120,000 psi (Grade 5) ensures reliable performance under high-stress conditions.
- Enhanced anti-rotation security provided by the integrated square neck, preventing bolt spin during installation and use.
- Precise coarse UNC threading (Class 3A) allows for faster assembly and reduced risk of cross-threading.
- Wide rounded head design distributes clamping force evenly, minimizing surface damage and improving joint integrity.
- Full compliance with ASME B18.5 and SAE J429 standards guarantees consistent quality and dimensional accuracy.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt is engineered to address common industrial fastening challenges, such as vibration-induced loosening and material fatigue. The square neck securely locks into wood or metal, eliminating rotation during torque application—ideal for structural frameworks, machinery assembly, and transportation equipment. Its UNC coarse thread and Class 3A fit provide rapid installation with high resistance to stripping, while the zinc plating offers a durable barrier against rust in outdoor or humid settings. With a Rockwell C25 hardness and 120,000 psi tensile strength, it delivers reliable performance in heavy-duty applications like construction, agricultural machinery, and trailer manufacturing, ensuring long-term joint stability.
Specification Summary & Compliance
This carriage bolt adheres to ASME B18.5 and SAE J429 specifications, with precise UNC coarse thread (1/2"-13) and Class 3A thread fit for optimal dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental and safety regulations are satisfied. The bolt features a fully threaded design with right-hand direction, a square neck for anti-rotation, and a rounded head profile, manufactured from high-strength zinc-plated steel.
