S-93548A738 1/2"-13 x 7" 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 corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments.
- Enhanced anti-rotation and secure fastening due to the integrated square neck design, preventing bolt spin during installation.
- High tensile strength of 60,000 PSI (Grade 2 classification) ensures reliable performance under heavy loads and stress.
- Excellent durability and wear resistance provided by Rockwell B70 hardness, maintaining integrity in demanding applications.
- Wide rounded head profile offers a larger bearing surface for improved load distribution and reduced surface damage.
- Coarse UNC threading (1/2"-13) allows for quicker assembly and better performance in wood and soft materials.
- Partial threading design provides a strong, unthreaded shank for shear strength where needed.
Professional Applications & Engineering Value
This zinc-plated steel carriage bolt is engineered to address common challenges in construction, machinery assembly, and structural framing. The square neck design is critical for preventing rotation when tightening, ensuring a secure fit in pre-drilled square holes—ideal for wood-to-metal and heavy timber connections. With a Grade 2 strength rating and 60,000 PSI tensile strength, it handles dynamic loads and vibrations in industrial settings. The coarse UNC thread and partial threading enhance grip and resistance to loosening, while the zinc plating offers reliable protection against rust, making it a top choice for outdoor and high-moisture applications.
Specification Summary & Compliance
This carriage bolt features precise Class 2A thread fit and adheres to UNC thread standards with a 1/2"-13 coarse thread size. It is manufactured in compliance with ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring consistent quality and dimensional accuracy. The product is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for global industrial use.
