S-93548A740 1/2"-13 x 8" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
• Excellent anti-rotation performance with integrated square neck design that prevents spinning during installation and use
• High tensile strength rating of 60,000 psi (Grade 2) ensures reliable performance under heavy loads
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster installation and secure fastening
• Enhanced durability with Rockwell B70 hardness that maintains structural integrity under repeated stress
• Versatile partial threading allows for both clamping and clearance functions in various assembly applications
• Comprehensive regulatory compliance meets RoHS 3 and REACH environmental standards for global manufacturing use

Professional Applications & Engineering Value

This heavy-duty carriage bolt delivers exceptional engineering value through its zinc-plated steel construction and specialized square neck design, which effectively solves common industrial fastening challenges. The combination of Grade 2 strength classification (60,000 psi tensile strength) and Rockwell B70 hardness ensures reliable performance in structural applications where vibration resistance and load-bearing capacity are critical. The partially threaded UNC coarse pattern with Class 2A thread fit provides optimal engagement in wood, metal, and composite materials, while the square neck prevents rotation during torque application - a common frustration in assembly operations. These features make it ideal for construction, agricultural equipment, trailer manufacturing, and industrial machinery where anti-rotation capability and corrosion resistance are essential for long-term reliability.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerance with UNC coarse threading (1/2"-13) and features a 6" minimum thread length on its 8" overall length. Manufacturing complies with ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring consistent quality and dimensional accuracy. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental regulations for industrial components.