S-93548A648 3/8"-16 x 6" 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 for extended service life in harsh environments
- Exceptional anti-rotation performance thanks to integrated square neck design that prevents spinning during installation
- High tensile strength rating of 60,000 psi ensures reliable performance in demanding applications
- Optimized thread engagement with UNC coarse threading for faster installation and reduced cross-threading risk
- Enhanced durability with Rockwell B70 hardness rating maintaining structural integrity under stress
- Wide rounded head profile provides larger bearing surface for improved load distribution
- Full threading capability allows for maximum adjustability and secure fastening throughout the entire length
Professional Applications & Engineering Value
These zinc-plated steel carriage bolts deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The square neck design fundamentally addresses the common challenge of bolt rotation during tightening in wood-to-metal and structural applications, eliminating the need for secondary locking mechanisms. The Grade 2 classification combined with UNC coarse threading makes these fasteners ideal for heavy equipment, trailer assemblies, and construction frameworks where rapid installation and reliable performance are essential. The zinc plating provides sacrificial corrosion protection, significantly extending service life in outdoor and industrial environments where moisture and environmental factors would compromise uncoated fasteners.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 3/8"-16 UNC coarse thread specifications. These carriage bolts conform to ASTM A307, SAE J429 Grade 2, and ASME B18.5 dimensional standards, ensuring interchangeability and reliable performance. Compliant with RoHS 3 (2015/863/EU) environmental regulations, making them suitable for various industrial applications without hazardous substance restrictions.
