S-93548A736 1/2"-13 x 6" 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
• Exceptional anti-rotation performance thanks to the integrated square neck design that prevents spinning during installation
• Heavy-duty load capacity with Grade 2 strength rating and 60,000 PSI tensile strength for reliable structural connections
• Optimized thread engagement with fully threaded UNC coarse threads for faster installation and superior holding power
• Wide bearing surface from the rounded carriage head design that distributes load evenly and prevents surface damage
• Precision manufacturing with Class 2A thread fit ensuring consistent performance and compatibility with standard nuts
• Enhanced durability with Rockwell B70 hardness providing excellent resistance to wear and deformation

Professional Applications & Engineering Value

These zinc-plated steel carriage bolts deliver exceptional engineering value in heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The combination of Grade 2 strength classification and fully threaded UNC coarse threading provides superior clamping force for wood-to-metal and structural timber connections. The square neck design effectively prevents rotation during tightening, eliminating the need for secondary locking mechanisms in construction frameworks, trailer assemblies, and agricultural equipment. The zinc plating offers reliable corrosion protection, making these carriage bolts ideal for outdoor structures, marine environments, and industrial settings where moisture exposure is a concern. With their 6-inch length and 1/2"-13 thread size, they accommodate thick material assemblies while maintaining consistent tensile strength throughout the fastener.

Specification Summary & Compliance

This carriage bolt features precision UNC coarse threads with Class 2A thread fit tolerance for optimal nut compatibility. Manufacturing complies with ASTM A307 specifications for low carbon steel structural bolts, SAE J429 for mechanical properties, and ASME B18.5 for dimensional standards. The product is RoHS 3 (2015/863/EU) compliant, ensuring environmental safety and regulatory adherence for industrial and construction applications worldwide.