S-92865A808 5/8"-11 x 3 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by zinc plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C25) offers excellent wear resistance and durability under heavy loads and vibration.
• Coarse UNC threading allows for faster installation and easier alignment, improving assembly efficiency in field applications.
• Precise Class 2A thread fit ensures consistent engagement and secure fastening, preventing loosening in dynamic conditions.
• External hex drive design enables high-torque application with standard tools, facilitating quick and secure installations.
• Full threading along the 3 1/2" length provides versatile grip range and uniform stress distribution for enhanced joint integrity.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address critical challenges in heavy machinery, structural steel connections, and industrial equipment assembly. The zinc plated steel construction combats corrosion in outdoor or high-moisture environments, while the coarse UNC thread resists vibration-induced loosening better than fine threads. The external hex drive allows for high clamping force application, making it ideal for bolted joints requiring precise preload. With fully threaded design, it accommodates varying material thicknesses in construction and manufacturing applications, ensuring reliable performance where shear and tensile strength are paramount. These screws deliver consistent performance in automotive, agricultural, and infrastructure projects where durability and compliance with industry standards are non-negotiable.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per UNC standards and complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use in regulated industries. Manufactured to Grade 5 strength classification with verified 120,000 psi tensile strength and Rockwell C25 hardness, it delivers consistent performance across industrial applications.