S-90128A173 1"-8 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 damage, extending service life in harsh industrial settings.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• High torque capability with a 3/4" hex drive allows for efficient installation and removal, saving time and labor in maintenance and assembly.
• Durable alloy steel construction with Rockwell C37 hardness offers excellent wear resistance, maintaining integrity through repeated use.
• Fully threaded design enables consistent clamping force along the entire length, ideal for applications requiring uniform load distribution.
• Compliance with industry standards like ASTM A574 ensures consistent quality and reliability, meeting rigorous engineering specifications.

Professional Applications & Engineering Value

This 1"-8 UNC Socket Head Cap Screw is engineered from zinc-plated alloy steel to address common industrial challenges such as vibration-induced loosening and corrosion in heavy machinery. The coarse thread spacing and Class 3A thread fit provide superior grip in materials like cast iron or steel, reducing the need for frequent retightening in dynamic environments. Its high tensile strength and Rockwell C37 hardness make it ideal for critical applications in construction, automotive assembly, and manufacturing equipment, where durability and precision are paramount. The fully threaded rod type ensures even stress distribution, preventing joint failure and enhancing safety in structural frameworks.

Specification Summary & Compliance

This socket head cap screw adheres to precise dimensional standards, including UNC thread type with Class 3A thread fit for accurate assembly. It meets ASTM A574 specifications for quality assurance and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.