S-93604A783 5/8"-11 x 16" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, extending service life in harsh industrial environments
• Secure anti-rotation installation through integrated square neck design that prevents spinning during tightening
• High tensile strength performance with Grade 2 rating and 60,000 psi capacity for heavy-duty applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring reliable fastening in various materials
• Enhanced structural integrity from Rockwell B70 hardness, providing excellent resistance to deformation under load
• Versatile partial threading allowing both secure clamping and smooth shank alignment in assembly applications
• Regulatory compliance assurance meeting ASTM A307, ASME B18.5 standards plus RoHS 3 and REACH environmental directives

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt delivers exceptional value in structural and heavy equipment applications where corrosion resistance and vibration prevention are critical. The square neck design mechanically locks into materials during installation, eliminating rotation issues common in high-vibration environments like construction equipment, trailer assemblies, and agricultural machinery. The UNC coarse thread pattern combined with Grade 2 strength rating provides reliable performance in wood, metal, and composite materials, while the partial threading allows for both secure fastening and structural alignment. The substantial 16-inch length accommodates thick material stacks in framing, bridging, and industrial platform construction, making it ideal for contractors and OEMs requiring durable, code-compliant fastening solutions.

Specification Summary & Compliance

This 5/8"-11 UNC carriage bolt features Class 2A thread fit tolerance for consistent engagement and meets ASTM A307 specifications for low carbon steel fasteners and ASME B18.5 dimensional standards. The product maintains compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. Manufacturing follows standardized dimensions including 1.344" head diameter, 0.34" square neck length, and minimum 6" thread length, ensuring interchangeability and reliable performance across industrial applications.