S-92356A144 5/16"-18 x 3 1/4" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation security with a square neck design that prevents spinning during installation, ensuring reliable fastening in high-vibration environments.
• Exceptional corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial, construction, and marine applications.
• High tensile strength of 70,000 psi and Rockwell B55 hardness for reliable performance under heavy loads and demanding conditions.
• Fully threaded UNC coarse thread design allows for deep engagement and faster installation, reducing assembly time.
• Precision Class 2A thread fit ensures consistent, smooth threading and compatibility with standard nuts.
• Compliance with ASME B18.5 standards guarantees dimensional accuracy and interchangeability for professional use.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory requirements.

Professional Applications & Engineering Value

This 5/16"-18 UNC carriage bolt is engineered to solve critical fastening challenges in demanding environments. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it ideal for outdoor, marine, and chemical-exposed settings where durability is paramount. The integrated square neck securely locks into materials, preventing rotation during torque application—a common issue in wood-to-metal and structural assemblies. With a fully threaded coarse UNC thread and Class 2A fit, it ensures quick, reliable installation and consistent clamping force. These features make it a top choice for industrial machinery, construction frameworks, and transportation equipment, where vibration resistance and long-term reliability are essential.

Specification Summary & Compliance

This carriage bolt adheres to ASME B18.5 specifications, ensuring precise dimensions including a 5/16"-18 UNC coarse thread with Class 2A thread fit for consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental standards. The bolt's construction from 18-8 stainless steel provides reliable mechanical properties, including a tensile strength of 70,000 psi and Rockwell B55 hardness, suitable for rigorous industrial applications.