S-90185A260 5/8"-11 x 7" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance thanks to the integrated square neck design, preventing the bolt from turning during installation and ensuring secure, permanent fastening.
• Exceptional strength and durability with a Grade 5 classification and 120,000 psi tensile strength, making it ideal for heavy-duty structural applications.
• Enhanced corrosion resistance provided by the zinc-plated steel construction, extending the bolt's service life in various environmental conditions.
• Reliable and precise threading with UNC coarse threads and a Class 3A fit, ensuring easy assembly and a secure, vibration-resistant connection.
• Optimized for high-stress applications due to its Rockwell C25 hardness, offering excellent resistance to wear and deformation.
• Versatile partial threading allows for a non-threaded shank to bear shear loads while the threaded portion secures the nut.
• Broad industrial compliance meeting ASME B18.5 standards, RoHS 3, and REACH regulations for quality and environmental safety.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to solve critical fastening challenges in demanding industrial applications. The zinc-plated steel material provides a robust barrier against rust and corrosion, essential for outdoor or high-moisture environments like construction and agricultural machinery. Its defining square neck design is a key engineering feature, biting into the mating material to prevent rotation during torque application, which eliminates the need for a second tool and speeds up assembly. The UNC coarse thread and Class 3A fit offer superior engagement and vibration resistance, making it a reliable choice for wood-to-metal connections, trailer beds, and structural framing where joint integrity is paramount. The partially threaded design ensures that the unthreaded shank bears shear loads effectively, preventing thread damage and maintaining the bolt's 120,000 psi tensile strength.

Specification Summary & Compliance

This carriage bolt features a 5/8"-11 UNC coarse thread with a precision Class 3A thread fit for reliable engagement. It is manufactured from zinc-plated steel to ASME B18.5 specifications (SAE J429), ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for hazardous substances.