S-93548A659 3/8"-16 x 12" 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
• Enhanced anti-rotation performance through integrated square neck design that prevents spinning during installation
• Reliable load-bearing capacity with Grade 2 strength rating and 60,000 psi tensile strength for heavy-duty applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening in various materials
• Versatile partial threading allowing both clamping and smooth shank functions for diverse assembly requirements
• Industry-standard compliance meeting ASTM A307, SAE J429, and ASME B18.5 specifications for quality assurance
• Environmental regulation adherence with RoHS 3 and REACH compliance for global industrial use

Professional Applications & Engineering Value

This 3/8"-16 carriage bolt delivers exceptional engineering value through its zinc-plated steel construction and specialized design features. The square neck carriage bolt configuration provides critical anti-rotation capability, solving common installation challenges in wood-to-metal and structural applications where vibration resistance is paramount. The partially threaded design with UNC coarse thread pattern ensures optimal performance in lumber, construction frameworks, and agricultural equipment, where the smooth shank portion prevents material damage while the threaded section delivers secure clamping force. With Rockwell B70 hardness and 60,000 psi tensile strength, this Grade 2 carriage bolt maintains structural integrity under significant mechanical stress, making it ideal for trailer manufacturing, fencing systems, and industrial machinery assemblies where reliability cannot be compromised.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances according to UNC coarse thread standards, ensuring consistent performance across applications. Manufacturing complies with ASTM A307 specifications for low carbon steel bolts, SAE J429 for mechanical properties, and ASME B18.5 for dimensional requirements. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substance restrictions.