S-93548A635 3/8"-16 x 2 3/4" 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
• Reliable anti-rotation performance through integrated square neck design that prevents spinning during installation
• High tensile strength rating of 60,000 PSI ensures dependable performance in heavy-duty applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
• Enhanced material durability with Rockwell B70 hardness for resistance against deformation under load
• Broad compatibility with right-hand threading conforming to multiple industrial standards
• Environmental compliance with RoHS 3 regulations for safe use across various industries

Professional Applications & Engineering Value

These Grade 2 zinc-plated steel carriage bolts deliver exceptional engineering value for industrial and construction applications where vibration resistance and structural integrity are critical. The square neck design provides positive locking against rotation, eliminating the need for additional anti-rotation components and simplifying installation in wood-to-metal and structural connections. The fully threaded UNC coarse spacing ensures rapid assembly while maintaining strong holding power, making them ideal for timber framing, trailer manufacturing, and heavy equipment assembly. The zinc-plated finish offers reliable corrosion protection in moderate environments, while the 60,000 PSI tensile strength provides a safety margin for load-bearing applications. These carriage bolts solve common fastening challenges by combining secure anti-rotation features with standardized threading for consistent performance across construction and industrial maintenance projects.

Specification Summary & Compliance

This 3/8"-16 carriage bolt features precise Class 2A thread fit with UNC coarse thread spacing, ensuring dimensional accuracy and reliable engagement. Manufactured to meet ASTM A307, SAE J429, and ASME B18.5 specifications, guaranteeing consistent quality and performance standards. The product is RoHS 3 (2015/863/EU) Compliant for environmental safety and regulatory acceptance across global markets. With a defined length of 2-3/4" and square neck dimensions of 0.22" length by 0.39" width, these fasteners provide standardized compatibility for industrial applications requiring reliable anti-rotation characteristics.