S-90128A245 1/4"-20 x 3/4" 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.
• Zinc-plated alloy steel construction provides enhanced corrosion resistance, extending the fastener's lifespan in harsh industrial environments.
• Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies with minimal backlash.
• UNC coarse threads enable quick and easy installation, reducing assembly time and labor costs in repetitive fastening tasks.
• Hex socket drive design allows for high torque application and access in confined spaces, improving installation efficiency.
• Full threading along the entire length ensures consistent clamping force and versatility in various material thicknesses.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting stringent industry and regulatory standards.

Professional Applications & Engineering Value

Engineered for high-strength industrial applications, this zinc-plated alloy steel socket head cap screw addresses critical challenges in machinery, automotive, and heavy equipment assembly. The UNC coarse thread design prevents cross-threading and ensures rapid installation, while the Class 3A fit provides exceptional dimensional accuracy for vibration-prone environments. With a Rockwell C37 hardness and robust 170,000 psi tensile strength, it resists deformation under load, making it ideal for securing structural components, engine parts, and precision fixtures. The hex drive socket facilitates secure tool engagement, enabling efficient maintenance and disassembly in space-constrained setups, ultimately enhancing operational reliability and reducing downtime.

Specification Summary & Compliance

This socket head cap screw features precise inch measurements with a 1/4"-20 UNC coarse thread and Class 3A thread fit for tight tolerance fastening. It is manufactured in accordance with ASTM A574 specifications, ensuring consistent material properties and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.