S-90128A213 8-32 x 2 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial settings.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening in machinery and equipment.
• Partially threaded design allows for controlled clamping force and easier alignment, ideal for components requiring specific grip ranges.
• High hardness (Rockwell C37) enhances wear resistance and durability, maintaining thread integrity through repeated use and adjustments.
• Hex drive compatibility (9/64") enables easy installation with standard tools, reducing assembly time and improving efficiency in production lines.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties, ensuring reliability for critical engineering applications.

Professional Applications & Engineering Value

This 8-32 UNC thread socket head cap screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in machinery assemblies. The zinc-plated alloy steel construction provides a robust barrier against moisture and chemicals, making it suitable for automotive, aerospace, and heavy equipment applications where environmental resistance is critical. The coarse thread design facilitates quick installation and high clamping force, while the partially threaded rod allows precise engagement in tapped holes or nuts. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands dynamic loads and repetitive stress, reducing maintenance needs and downtime in production environments. Ideal for securing components in enclosures, frames, and moving parts, this fastener ensures long-term reliability and performance.

Specification Summary & Compliance

This product features a Class 3A thread fit for high precision and UNC coarse threads with a size of 8-32, ensuring compatibility with standard components. It meets ASTM A574 specifications for alloy steel socket head cap screws, confirming consistent mechanical properties and manufacturing quality. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances. The dimensions include a length of 2-1/2" and a minimum thread length of 1", with a right-hand thread direction and standard socket head profile for uniform performance.