S-93180A364 5/16"-18 x 3 1/2" ASME B18.5 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 in harsh environments thanks to 316 stainless steel construction
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty performance
- Secure anti-rotation locking provided by the square neck design, preventing bolt spin during installation
- Wide, rounded head profile distributes clamping force effectively and provides a finished appearance
- Easy installation and removal with coarse UNC threading and Class 2A fit for standard tool compatibility
- Full threading along the 3 1/2" length offers versatile nut placement and adjustment flexibility
- Compliance with major industry standards ensures material quality, dimensional accuracy, and environmental safety
Professional Applications & Engineering Value
This 316 Stainless Steel Carriage Bolt is engineered to solve critical challenges in demanding industrial settings. The corrosion-resistant 316 alloy provides long-term reliability in marine, chemical, and outdoor applications where moisture and corrosive agents are present. The combination of 70,000 psi tensile strength and a Rockwell B55 hardness ensures the bolt can withstand high stress and vibration without failing. The square neck under the wide, rounded carriage head bites into the mounting material, preventing rotation during torque application—a common frustration in assembly. With fully threaded coarse UNC spacing and a Class 2A thread fit, it offers excellent engagement and is compatible with standard nuts, speeding up installation in structural frameworks, machinery, and transportation equipment.
Specification Summary & Compliance
This bolt features a 5/16"-18 UNC thread with Class 2A dimensional accuracy for consistent fit. It is manufactured to meet the dimensional requirements of ASME B18.5. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental regulations for hazardous substances.
