S-90128A372 1/4"-28 x 1" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI for reliable performance in high-stress industrial applications.
• Superior corrosion resistance provided by the zinc-plated alloy steel, extending service life in demanding environments.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening under vibration.
• Fine UNF threads offer improved load distribution and enhanced holding power compared to coarse threads.
• Hex socket drive allows for high-torque installation and removal in confined spaces with standard tools.
• Full threading along the 1" length provides maximum grip and adjustability in assembled components.
• High hardness rating (Rockwell C37) resists wear and deformation, maintaining integrity through repeated use.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 1/4"-28 UNF socket head cap screw delivers reliable fastening in machinery, automotive assemblies, and precision equipment. The zinc-plated alloy steel construction combats corrosion, while the Class 3A fine threads provide a precise, vibration-resistant fit that prevents joint failure. Its hex drive socket head enables easy access in tight spaces, making it ideal for applications where space constraints and high tensile loads are common. With a fully threaded design, it ensures uniform stress distribution and secure clamping in critical connections, reducing maintenance needs and enhancing operational safety.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-28 UNF thread with Class 3A tolerance for precise fit and consistent performance. Manufactured in compliance with ASTM A574 specifications, it meets rigorous quality standards. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence for global industrial use.