S-90185A152 5/8"-11 x 3" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck that securely locks into materials, preventing the bolt from spinning during installation and under vibration.
• Exceptional tensile strength of 120,000 psi, providing reliable load-bearing capacity for demanding structural and heavy-duty applications.
• Enhanced corrosion resistance from the black-oxide steel finish, extending the bolt's service life in various industrial environments.
• Wide, rounded head design distributes clamping force over a larger area, reducing surface damage and providing a finished appearance.
• Coarse UNC threading ensures faster installation and is less prone to clogging with debris compared to fine threads.
• Precise Class 2A thread fit offers consistent and reliable engagement with standard nuts, simplifying assembly.
• High-strength Grade 5 rating guarantees consistent mechanical properties, including a Rockwell C25 hardness, for dependable performance.

Professional Applications & Engineering Value

This Grade 5 Carriage Bolt is engineered to solve critical challenges in industrial assembly, particularly where vibration resistance and structural integrity are paramount. The black-oxide steel construction provides a durable barrier against rust, making it ideal for outdoor equipment, agricultural machinery, and construction frameworks. The square neck under the wide, rounded head bites into the mounting surface, effectively preventing rotation during torque application and in high-vibration environments. Its fully threaded design with coarse UNC threading allows for versatile adjustment and secure fastening in wood, metal, and other materials, ensuring a reliable connection that maintains 120,000 psi tensile strength under stress.

Specification Summary & Compliance

This carriage bolt features a 5/8"-11 UNC thread with a Class 2A fit for standard tolerance and compatibility. It is manufactured to meet ASME B18.5 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial markets.