S-93548A591 5/16"-18 x 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 corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Reliable anti-rotation performance through integrated square neck design that prevents spinning during installation
- Heavy-duty load capacity with 60,000 psi tensile strength and Grade 2 classification for structural applications
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
- Enhanced installation convenience featuring fully threaded design and wide rounded head for better tool access
- Proven material durability with Rockwell B70 hardness that maintains integrity under repeated stress
- Broad compatibility with standardized dimensions that fit common industrial and construction requirements
Professional Applications & Engineering Value
This Grade 2 zinc-plated steel carriage bolt delivers exceptional engineering value through its combination of square neck anti-rotation design and UNC coarse threading. The fully threaded configuration ensures maximum engagement in wood-to-metal and structural steel applications, while the wide rounded head provides superior bearing surface distribution. Engineers specify this fastener for construction frameworks, industrial equipment assembly, and agricultural machinery where vibration resistance and long-term reliability are critical. The zinc plating offers essential corrosion protection in environments exposed to moisture and temperature variations, making it ideal for outdoor structures, material handling systems, and building infrastructure projects requiring ASTM A307 compliance.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (5/16"-18). Complies with ASTM A307, SAE J429 Grade 2, and ASME B18.5 manufacturing standards. Meets RoHS 3 (2015/863/EU) compliance requirements for restricted substance control. Features include 2" length, 0.313" screw diameter, square neck design (0.32" width, 0.19" length), and fully threaded right-hand configuration.
