S-93180A330 5/16"-18 x 1 1/2" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Enhanced load distribution from the wide rounded head design, minimizing surface damage and pull-through
• Secure anti-rotation locking provided by the square neck, preventing bolt spinning during installation
• Reliable coarse threading (UNC) ensures faster assembly and better performance in high-vibration applications
• High tensile strength (70,000 psi) and Rockwell B55 hardness for dependable performance under heavy loads
• Precise Class 2A thread fit guarantees consistent engagement and smooth installation with standard nuts
• Full threading along the 1 1/2" length offers versatile fastening depth options for various material thicknesses

Professional Applications & Engineering Value

This 316 stainless steel carriage bolt delivers exceptional engineering value in demanding applications where corrosion resistance and structural integrity are critical. The square neck design effectively prevents rotation during tightening, making it ideal for wood-to-metal connections, structural framing, and machinery assembly. Its UNC coarse threading provides superior performance in soft materials and high-vibration environments, while the fully threaded configuration accommodates varying material thicknesses. The rounded head profile offers a finished appearance and reduces snagging hazards in conveyor systems, agricultural equipment, and marine hardware. Engineered to withstand corrosive chemicals, saltwater, and extreme temperatures, this bolt solves common fastener failure points in wastewater treatment, food processing, and offshore applications.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances with 5/16"-18 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.5 dimensional standards, ensuring interchangeability and reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental regulations for hazardous substance restrictions.