S-93548A650 3/8"-16 x 7" 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 demanding environments
• Prevents rotation during installation thanks to the integrated square neck design that locks securely into materials
• High tensile strength performance with Grade 2 classification and 60,000 PSI rating for reliable heavy-duty applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring smooth installation and vibration resistance
• Enhanced material hardness with Rockwell B70 rating providing excellent durability and deformation resistance
• Versatile partial threading allowing unthreaded shank sections for superior shear strength in structural connections
• Regulatory compliance assurance meeting major industrial standards and environmental regulations for global supply chain compatibility

Professional Applications & Engineering Value

This zinc-plated steel carriage bolt delivers critical engineering solutions for industrial and construction applications where vibration resistance and long-term reliability are paramount. The square neck design fundamentally addresses the common issue of bolt rotation during torque application, ensuring stable fastening in wood-to-metal and structural steel connections. With its Grade 2 strength classification and 60,000 PSI tensile strength, this fastener withstands substantial static and dynamic loads in equipment assembly, trailer manufacturing, and structural framing. The UNC coarse thread pattern combined with partial threading provides optimal stress distribution, while the zinc plating offers sacrificial protection against environmental corrosion, making it ideal for outdoor structures, agricultural equipment, and industrial machinery where maintenance access is limited.

Specification Summary & Compliance

This carriage bolt maintains precision Class 2A thread fit with UNC 3/8"-16 coarse threading and right-hand direction. Manufacturing complies with ASTM A307, SAE J429, and ASME B18.5 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.