S-93604A621 1/4"-20 x 2" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating for long-lasting performance in harsh industrial environments
• Reliable anti-rotation performance thanks to the square neck design that prevents spinning during installation and use
• High tensile strength of 60,000 psi ensures dependable load-bearing capacity for demanding applications
• Easy installation and removal with UNC coarse threading and right-hand thread direction for efficient assembly
• Consistent quality assurance through Rockwell B70 hardness rating and Class 2A thread fit for precise engineering tolerances
• Broad compatibility with Grade 2 strength classification meeting multiple industry standards for versatile use
• Enhanced safety compliance with RoHS 3 and REACH environmental regulations for responsible manufacturing

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt delivers exceptional engineering value for industrial fastening applications where corrosion resistance and anti-rotation performance are critical. The square neck design effectively prevents bolt rotation during tightening, making it ideal for wood-to-metal connections, structural framing, and machinery assembly. The fully threaded UNC coarse thread configuration ensures maximum grip strength while facilitating quicker installation in production environments. With Grade 2 strength classification and 60,000 psi tensile strength, this fastener maintains structural integrity under substantial loads, while the hot-dipped galvanization provides superior protection against rust and environmental degradation in outdoor or high-moisture applications. These features combine to create a reliable fastening solution that reduces maintenance frequency and enhances long-term project durability.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit with UNC coarse threading (1/4"-20) and right-hand direction. Manufacturing complies with ASTM A307 and ASME B18.5 standards, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting current industry requirements for safe and sustainable industrial components.