S-90128A365 1/4"-28 x 3/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Zinc-plated alloy steel construction provides excellent corrosion resistance, extending service life in demanding environments.
• Class 3A fine thread fit offers precise, secure fastening with minimal play, ideal for vibration-resistant assemblies.
• Fully threaded design allows for maximum grip and uniform load distribution along the entire length.
• Hex socket drive enables easy installation and removal with standard tools, improving assembly efficiency.
• Compliance with ASTM A574 guarantees consistent quality and dimensional accuracy for industrial use.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

This 1/4"-28 UNF Socket Head Cap Screw is engineered for precision applications where strength and reliability are critical. The zinc-plated alloy steel material combats corrosion in harsh industrial settings, while the fine thread Class 3A fit provides tight tolerances to prevent loosening under vibration. Commonly used in machinery, automotive, and aerospace assemblies, its fully threaded and hex drive design ensures quick, secure fastening in confined spaces. With a Rockwell C37 hardness and high tensile strength, it withstands heavy loads, making it a trusted choice for engineers seeking durable, compliant fasteners that meet ASTM A574 standards.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-28 UNF fine thread with Class 3A fit for precise engagement, and is manufactured to ASTM A574 specifications for consistent quality. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.