S-93548A560 1/4"-20 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 coating for extended service life in demanding environments
- Secure non-rotating installation thanks to integrated square neck design that prevents spinning during tightening
- Heavy-duty load capacity with 60,000 PSI tensile strength and Rockwell B70 hardness for structural applications
- Wide compatibility with UNC coarse threading and Class 2A fit ensuring reliable engagement with standard nuts
- Full-threaded design providing maximum grip length and flexibility in various material thicknesses
- Rounded head profile offering smooth finished appearance and reduced snag hazards in visible applications
- Regulatory compliance meeting multiple industry standards for quality assurance and environmental safety
Professional Applications & Engineering Value
These Grade 2 carriage bolts deliver exceptional performance in construction, structural framing, and heavy equipment assembly applications. The zinc-plated steel construction provides reliable corrosion resistance against environmental exposure, while the square neck design effectively solves the common problem of bolt rotation during installation - eliminating the need for secondary locking mechanisms. The fully threaded UNC coarse thread configuration ensures rapid installation and superior holding power in wood, metal, and composite materials. With 60,000 PSI tensile strength and Rockwell B70 hardness, these industrial fasteners maintain structural integrity under significant vibrational and load stresses, making them ideal for demanding applications where reliability cannot be compromised.
Specification Summary & Compliance
This 1/4"-20 carriage bolt features Class 2A thread fit tolerance for consistent mating with standard nuts. Manufacturing complies with ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant, meeting environmental regulations for hazardous substance restrictions. The 4-1/2" length with fully threaded right-hand UNC coarse thread provides versatile fastening solutions across various industrial and construction applications.
