S-97000A532 1/2"-13 x 4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Maximum Load Capacity - Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in the most demanding heavy-duty applications
• Superior Anti-Rotation Security - Square neck design provides positive locking action that prevents bolt spinning during installation and vibration
• Enhanced Corrosion Protection - Zinc yellow-chromate plating offers exceptional rust resistance for extended service life in harsh environments
• Optimized Thread Engagement - UNC coarse thread spacing with Class 2A fit ensures quick installation and reliable fastening in various materials
• Exceptional Durability - Rockwell C33 hardness rating maintains structural integrity under high stress and repeated loading conditions
• Industry Standard Compliance - Manufactured to ASME B18.5 specifications for guaranteed dimensional accuracy and performance consistency
• Full Thread Accessibility - Completely threaded shank allows for maximum adjustability and versatile mounting options

Professional Applications & Engineering Value

This Grade 8 carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The square neck design effectively eliminates rotational movement, making it ideal for wood-to-metal connections, structural steel framing, and heavy equipment assembly. The zinc yellow-chromate plating provides superior corrosion protection in outdoor applications, manufacturing facilities, and marine environments. With its 150,000 psi tensile strength and UNC coarse threading, this fully threaded carriage bolt ensures rapid installation while maintaining the high clamping force required for critical structural connections. The combination of Rockwell C33 hardness and ASME B18.5 compliance guarantees consistent performance in construction, transportation, and industrial machinery applications where failure is not an option.

Specification Summary & Compliance

This heavy-duty carriage bolt features precision Class 2A thread fit with UNC 1/2"-13 coarse thread spacing and right-hand threading direction. The fastener meets ASME B18.5 dimensional specifications and SAE J429 Grade 8 mechanical requirements, ensuring industry-standard performance. The square neck measures 0.28" in length and 0.52" in width, providing secure anti-rotation capability. With a 1.094" head diameter and 4" overall length, this carriage bolt delivers exact dimensional accuracy for professional installation. The zinc yellow-chromate finish meets industrial corrosion resistance standards for extended service life in demanding applications.