S-90185A262 5/8"-11 x 8 1/2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure under high stress.
• Superior corrosion resistance from zinc-plated steel construction extends service life in harsh industrial environments, minimizing maintenance and replacement costs.
• Secure anti-rotation design with a square neck prevents spinning during installation, providing stable and efficient assembly without additional tools.
• Precision Class 3A thread fit with UNC coarse threading offers easy engagement and consistent fastening, enhancing productivity in repetitive applications.
• High hardness rating of Rockwell C25 ensures durability and wear resistance, maintaining integrity in high-vibration settings.
• Compliance with ASME B18.5 standards guarantees dimensional accuracy and interchangeability, supporting quality assurance in regulated industries.
• Environmental and safety compliance with RoHS 3 and REACH regulations ensures safe usage and meets global sustainability requirements.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to address common industrial challenges, such as loosening under dynamic loads and corrosion in outdoor or humid settings. The zinc-plated steel material provides a protective barrier against rust, ideal for construction, agricultural machinery, and transportation equipment. Its partially threaded design with a square neck ensures the bolt remains firmly seated during tightening, preventing rotation and reducing installation time. With a coarse UNC thread and Class 3A fit, it delivers reliable grip in wood, metal, and composite assemblies, making it a versatile choice for heavy-duty fastening solutions that require long-term reliability and compliance with ASME B18.5 specifications.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading (5/8"-11) to ensure compatibility with standard nuts and components. Manufactured in accordance with ASME B18.5 and SAE J429 Grade 5 specifications, it meets rigorous mechanical and performance criteria. Additionally, the product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.