S-93548A638 3/8"-16 x 3 1/2" 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
• Prevent rotation during installation thanks to the integrated square neck design that locks securely into materials
• High tensile strength performance with 60,000 PSI rating and Grade 2 classification for reliable load-bearing applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit for faster assembly and reduced cross-threading risk
• Enhanced material durability with Rockwell B70 hardness providing excellent resistance to deformation under stress
• Wide application compatibility with fully threaded right-hand design accommodating various material thicknesses
• Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety

Professional Applications & Engineering Value

This Grade 2 zinc-plated steel carriage bolt delivers exceptional engineering value through its combination of high tensile strength (60,000 PSI) and corrosion-resistant zinc plating. The square neck carriage bolt design prevents rotation during installation, eliminating the need for secondary locking mechanisms and reducing assembly time in wood-to-metal and structural applications. The UNC coarse thread configuration with Class 2A fit ensures reliable engagement in wood, plastic, and metal components while resisting vibration-induced loosening. These industrial bolts are particularly valuable in construction, agricultural equipment, and transportation infrastructure where heavy-duty fasteners must maintain integrity under dynamic loads and environmental exposure.

Specification Summary & Compliance

This 3/8"-16 carriage bolt features precise Class 2A thread fit with UNC coarse threading and maintains dimensional accuracy per ASME B18.5 specifications. The fastener complies with ASTM A307 and SAE J429 Grade 2 standards for material composition and mechanical properties, ensuring consistent performance across industrial applications. Environmental compliance is verified through RoHS 3 (2015/863/EU) adherence, confirming the absence of restricted hazardous substances in the zinc-plated steel construction.