S-93548A587 5/16"-18 x 1 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
• Exceptional load-bearing capacity with 60,000 PSI tensile strength and Grade 2 classification for reliable structural connections
• Anti-rotation security through integrated square neck design that prevents spinning during installation
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and vibration resistance
• Enhanced material durability with Rockwell B70 hardness to withstand mechanical stress and deformation
• Versatile rounded head profile designed for smooth surface contact and reduced snagging hazards
• Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety

Professional Applications & Engineering Value

These zinc-plated steel carriage bolts deliver critical performance advantages for industrial and construction applications where vibration resistance and structural integrity are paramount. The square neck design provides positive locking against rotation during torque application, eliminating the need for secondary locking mechanisms in wood-to-metal and structural steel connections. With fully threaded UNC coarse spacing and Class 2A thread fit, these fasteners offer superior pull-out resistance in soft materials while accommodating minor misalignments. The rounded head profile creates a finished appearance while minimizing protrusion hazards in high-traffic areas. Engineered to withstand heavy loads and environmental exposure, these carriage bolts solve common fastening challenges in trailer manufacturing, structural framing, and heavy equipment assembly where reliability cannot be compromised.

Specification Summary & Compliance

This carriage bolt features precise dimensional control with Class 2A thread tolerance and UNC coarse thread spacing (5/16"-18) for consistent performance. Manufacturing complies with ASTM A307, SAE J429 Grade 2, and ASME B18.5 specifications, ensuring dimensional accuracy and material properties. The product is RoHS 3 (2015/863/EU) Compliant for environmental safety, with zinc-plated surface treatment providing corrosion protection. Mechanical properties include 60,000 PSI tensile strength and Rockwell B70 hardness for dependable performance in rated applications.