S-90128A312 6-32 x 7/16" ASME B18.3, ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit precision provides tighter tolerances for secure, vibration-resistant assemblies in critical machinery and equipment.
• Zinc-plated alloy steel construction offers superior corrosion resistance, extending service life in harsh industrial environments.
• Hex drive socket head design allows for high torque application and easy installation in confined spaces with standard tools.
• Rockwell C37 hardness rating enhances wear resistance and durability, maintaining thread integrity over repeated use.
• Coarse UNC threads enable quicker installation and better grip in a variety of materials, improving assembly efficiency.
• Full threading along the 7/16" length ensures maximum holding power and uniform stress distribution across the entire fastener.

Professional Applications & Engineering Value

These Socket Head Cap Screws are engineered to address common industrial challenges such as vibration loosening, corrosion, and high-load demands. The zinc-plated alloy steel material provides a protective barrier against moisture and chemicals, making them ideal for outdoor equipment, automotive assemblies, and manufacturing machinery. The 6-32 UNC coarse thread with Class 3A fit ensures precise engagement, minimizing play and enhancing joint integrity in dynamic applications. With a hex drive and standard socket head profile, they facilitate efficient installation in tight spaces, reducing assembly time and labor costs while delivering consistent performance under 170,000 psi tensile strength conditions.

Specification Summary & Compliance

This fastener adheres to ASME B18.3 specifications and is manufactured from ASTM A574 material, ensuring dimensional accuracy with a Class 3A thread fit for superior tolerance control. The UNC coarse thread and right-hand direction comply with standard industrial practices. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, confirming its safety for use in regulated environments without hazardous substances.