S-93548A553 1/4"-20 x 2 3/4" 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 plating, extending service life in harsh industrial environments
- Reliable anti-rotation performance due to integrated square neck design that prevents spinning during installation
- Excellent tensile strength rated at 60,000 PSI for dependable load-bearing capacity in demanding applications
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
- Enhanced material durability with Rockwell B70 hardness providing resistance to deformation under stress
- Full-threaded design offering maximum grip length and versatility across various material thicknesses
- Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety
Professional Applications & Engineering Value
These zinc-plated steel carriage bolts deliver exceptional engineering value in construction and industrial applications where vibration resistance and structural integrity are critical. The square neck design eliminates the need for additional anti-rotation components, providing secure fastening in wood-to-metal and structural steel connections. The Grade 2 classification and UNC coarse threading ensure reliable performance in heavy equipment, trailer assemblies, and building frameworks where 60,000 PSI tensile strength withstands substantial mechanical stress. The fully threaded configuration accommodates varying material thicknesses while maintaining consistent clamping force, making these carriage bolts ideal for agricultural machinery, storage systems, and infrastructure projects requiring durable, maintenance-free fastening solutions.
Specification Summary & Compliance
This carriage bolt features precise Class 2A thread fit with 1/4"-20 UNC coarse thread specifications and maintains dimensional accuracy per ASME B18.5 standards. Manufacturing compliance includes ASTM A307 for chemical composition and mechanical properties, along with SAE J429 for Grade 2 classification. The product is RoHS 3 (2015/863/EU) Compliant, ensuring environmental safety standards are met for hazardous substance restrictions.
