S-93604A613 1/4"-20 x 1" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion protection through hot-dipped galvanized steel coating, extending service life in harsh environments
• Exceptional anti-rotation performance with integrated square neck design that prevents spinning during installation
• High tensile strength rating of 60,000 PSI (Grade 2) ensures reliable performance under substantial loads
• Quick installation advantage with UNC coarse threading that reduces assembly time and effort
• Precise thread engagement with Class 2A thread fit for consistent, secure fastening connections
• Optimized head design featuring a wide, rounded carriage head for enhanced bearing surface and finished appearance
• Industry compliance assurance meeting ASTM A307, ASME B18.5 standards and environmental regulations

Professional Applications & Engineering Value

These hot-dipped galvanized steel carriage bolts deliver exceptional value in demanding applications where corrosion resistance and anti-rotation performance are critical. The Grade 2 classification with 60,000 PSI tensile strength and Rockwell B70 hardness ensures reliable performance in structural connections, wood-to-metal fastening, and outdoor equipment assembly. The square neck design effectively prevents rotation during nut tightening, eliminating the need for secondary locking mechanisms and reducing installation time. The UNC coarse threading provides rapid assembly in various materials, while the hot-dipped galvanized coating offers superior protection against rust and corrosion in outdoor, marine, and industrial environments. These carriage bolts are engineered to maintain integrity in construction, agricultural equipment, fencing systems, and transportation applications where vibration resistance and long-term durability are essential requirements.

Specification Summary & Compliance

This 1/4"-20 x 1" carriage bolt features precise Class 2A thread fit with UNC coarse threading and right-hand thread direction. Manufacturing complies with ASTM A307 specifications for low carbon steel bolts and ASME B18.5 dimensional standards. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications. The hot-dipped galvanized surface treatment provides corrosion resistance while maintaining the mechanical properties specified for Grade 2 fasteners.