S-90185A598 5/16"-18 x 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
- Superior anti-rotation performance with a square neck design that locks securely into materials, preventing bolt spin during installation and use.
- Enhanced corrosion resistance from zinc-plated steel construction, providing durable protection in various industrial and outdoor environments.
- High tensile strength of 120,000 PSI ensures reliable load-bearing capacity and structural integrity for demanding applications.
- Excellent hardness (Rockwell C25) offers resistance to wear and deformation, extending the fastener's service life.
- Wide, rounded carriage head distributes clamping force effectively and provides a finished appearance without marring surfaces.
- Coarse UNC threading allows for faster installation and better performance in wood and soft materials.
- Precise Class 2A thread fit ensures smooth assembly and consistent performance with standard nuts.
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel carriage bolt is engineered to address critical challenges in heavy-duty construction and industrial assembly. The fully threaded UNC coarse thread design enables quick, secure fastening in wood, metal, and composite materials, reducing installation time while maintaining high tensile strength. The square neck effectively counters rotation, a common issue in vibrating environments, ensuring long-term stability in machinery, structural frameworks, and transportation equipment. Its zinc plating provides a protective barrier against moisture and corrosion, making it ideal for outdoor applications like fencing, decking, and agricultural equipment where durability is paramount. By combining robust materials with precision engineering, this bolt delivers reliable performance in demanding industrial applications.
Specification Summary & Compliance
This carriage bolt features a 5/16"-18 UNC coarse thread with Class 2A thread fit for standard tolerance and compatibility. It complies with ASME B18.5 and SAE J429 specifications, ensuring consistent manufacturing quality. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, supporting safe and sustainable usage in global markets.
