S-93548A605 5/16"-18 x 5 1/2" ASTM A307, SAE J429, 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 anti-rotation performance with a square neck design that prevents spinning during installation and under vibration
- Enhanced corrosion resistance from zinc plating, extending service life in demanding industrial environments
- High tensile strength of 60,000 PSI and Rockwell B70 hardness for reliable load-bearing in heavy-duty applications
- Easy installation and secure fastening with fully threaded UNC coarse threads and right-hand direction
- Wide, rounded carriage head distributes clamping force effectively and provides a finished appearance
- Compliance with major industry standards including ASTM A307, SAE J429, and ASME B18.5 ensures consistent quality and interchangeability
- RoHS 3 compliance guarantees safe, environmentally responsible use across various sectors
Professional Applications & Engineering Value
These Grade 2 zinc-plated steel carriage bolts are engineered to solve critical fastening challenges in construction, agricultural equipment, and structural assemblies. The square neck design locks securely into materials, eliminating rotation during torque application—a common failure point in vibrating machinery. With fully threaded UNC coarse threads, they provide maximum grip length and faster installation in wood, metal, and composite materials. The zinc plating offers essential corrosion protection for outdoor and high-moisture environments, while the 60,000 PSI tensile strength ensures structural integrity under dynamic loads. Ideal for trailer manufacturing, framing systems, and industrial machinery where anti-rotation and heavy-duty performance are paramount.
Specification Summary & Compliance
This 5/16"-18 UNC carriage bolt features Class 2A thread fit for standard clearance applications and a 5 1/2" length with square neck measuring 0.19" in length and 0.32" in width. Manufactured to meet ASTM A307, SAE J429 Grade 2, and ASME B18.5 dimensional and mechanical specifications. Fully compliant with RoHS 3 (2015/863/EU) regulations for restricted substance control.
