S-93548A554 1/4"-20 x 3" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts
Carriage Bolts
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Enhanced anti-rotation performance through integrated square neck design that prevents spinning during installation
- Reliable heavy-duty fastening with Grade 2 strength rating and 60,000 PSI tensile strength for structural applications
- Optimized thread engagement with UNC coarse threading that provides faster installation and better performance in softer materials
- Consistent dimensional accuracy with Class 2A thread fit ensuring proper mating with nuts and threaded components
- Wide bearing surface from the 0.594" rounded head that distributes load effectively and reduces surface damage
- Full regulatory compliance meeting ASTM A307, SAE J429, and ASME B18.5 standards for quality assurance
Professional Applications & Engineering Value
These zinc-plated steel carriage bolts deliver exceptional engineering value in construction, manufacturing, and heavy equipment applications where vibration resistance and long-term reliability are critical. The combination of Grade 2 strength classification with 60,000 PSI tensile strength ensures structural integrity under significant loads, while the square neck design fundamentally solves the common problem of fastener rotation during tightening in wood, metal, and composite materials. The UNC coarse thread pattern provides superior holding power in softer substrates and allows for quicker installation, reducing labor time in industrial assembly operations. The zinc plating offers essential corrosion protection, making these carriage bolts suitable for both indoor and outdoor applications where environmental exposure is a concern.
Specification Summary & Compliance
This 1/4"-20 x 3" carriage bolt features precise Class 2A thread fit tolerances with UNC coarse threading and right-hand thread direction. Manufacturing complies with ASTM A307, SAE J429 Grade 2, and ASME B18.5 specifications, ensuring consistent quality and dimensional accuracy. The fastener is RoHS 3 (2015/863/EU) Compliant for environmental safety and meets all specified mechanical properties including Rockwell B70 hardness and 60,000 PSI tensile strength requirements.
