S-97000A511 1/4"-20 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 PSI tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance from zinc yellow-chromate plating that protects against rust in harsh industrial environments
• Optimized hardness and durability with Rockwell C33 rating to prevent deformation under heavy loads
• Secure anti-rotation design featuring a square neck that locks into materials to prevent spinning during installation
• Easy installation and removal with UNC coarse threading that provides quick assembly and superior grip in various materials
• Wide bearing surface from the rounded carriage head design that distributes pressure evenly and prevents pull-through
• Precision manufacturing with Class 2A thread fit ensuring consistent performance and compatibility with standard nuts

Professional Applications & Engineering Value

This Grade 8 carriage bolt delivers critical engineering solutions for heavy-duty applications where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plating provides exceptional corrosion protection for outdoor equipment, agricultural machinery, and construction applications exposed to weather elements. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness ensures the fastener maintains its structural integrity under extreme loads and impact forces. The square neck carriage bolt design prevents rotation during torque application, making it ideal for wood-to-metal connections, trailer assemblies, and structural framing where security is essential. The UNC coarse threading offers superior holding power in softer materials while resisting vibration-induced loosening in dynamic applications.

Specification Summary & Compliance

This 1/4"-20 carriage bolt features precision Class 2A thread fit with right-hand UNC coarse threading and full threading along the 1" length. Manufactured to exacting standards with a square neck measuring 0.16" in length and 0.26" in width, ensuring proper anti-rotation performance. The product fully complies with ASME B18.5 and SAE J429 specifications for dimensional accuracy and mechanical properties, guaranteeing interchangeability and reliability in industrial applications. The zinc yellow-chromate finish meets industry standards for corrosion protection while maintaining the high-strength characteristics required for Grade 8 fasteners.