S-93548A601 5/16"-18 x 4 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 corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
- Exceptional tensile strength rated at 60,000 PSI (Grade 2) to withstand heavy loads and prevent failure
- Anti-rotation security through square neck design that locks securely into materials during installation
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and reliable fastening
- Enhanced durability with Rockwell B70 hardness to resist wear and deformation under stress
- Versatile rounded head profile designed for smooth surface contact and reduced snagging in wood and metal applications
- Full threading capability allowing maximum adjustability and grip length for various material thicknesses
Professional Applications & Engineering Value
These heavy-duty carriage bolts with square neck design provide critical anti-rotation performance in structural applications where vibration resistance is essential. The zinc-plated steel construction offers reliable corrosion protection for outdoor equipment, construction frameworks, and agricultural machinery. The UNC coarse threading enables quicker installation in wood-to-metal and structural steel connections, while the Grade 2 strength rating (60,000 PSI tensile) ensures dependable performance in load-bearing assemblies. The combination of Rockwell B70 hardness and fully threaded design makes these carriage bolts ideal for demanding industrial applications requiring both durability and installation flexibility.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC thread form (5/16"-18). Complies with ASTM A307, SAE J429, and ASME B18.5 specifications for quality assurance. Meets RoHS 3 (2015/863/EU) compliance requirements for environmental safety. Features include: 4-1/2" length, 0.719" head diameter, square neck (0.32" width, 0.19" length), and right-hand thread direction.
