S-93604A619 1/4"-20 x 1 3/4" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ideal for outdoor and harsh industrial environments
• Enhanced anti-rotation performance due to the square neck design, preventing bolt spinning during installation and use
• High tensile strength of 60,000 PSI (Grade 2) ensures reliable load-bearing capacity in demanding applications
• Quick and easy installation with UNC coarse threading and right-hand thread direction, reducing assembly time
• Durable rounded head profile provides a finished appearance and reduces snagging risks in wood and metal assemblies
• Consistent dimensional accuracy with Class 2A thread fit, ensuring proper mating with nuts and threaded components
• Comprehensive regulatory compliance including RoHS 3 and REACH, meeting international environmental and safety standards

Professional Applications & Engineering Value

These hot-dipped galvanized steel carriage bolts deliver exceptional value in construction, agricultural equipment, and transportation infrastructure where corrosion resistance and structural integrity are critical. The square neck securely locks into materials, eliminating rotation during torque application—solving common installation frustrations in wood-to-metal and framing applications. With UNC coarse threading and Grade 2 strength, they provide reliable fastening in vibrating environments while the rounded head minimizes protrusion hazards. The hot-dipped galvanization process ensures a thick, uniform coating that outperforms electroplated alternatives in salt-spray and moisture-rich conditions, extending service life in bridges, utility poles, and outdoor storage systems.

Specification Summary & Compliance

This 1/4"-20 x 1-3/4" carriage bolt features Class 2A thread fit per UNC coarse thread standards with full threading for consistent engagement. Manufactured to ASTM A307 and ASME B18.5 specifications, it guarantees dimensional precision and mechanical properties including Rockwell B70 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to hazardous substance restrictions and environmental safety protocols for global industrial use.