S-90044A317 1/4"-28 x 1 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 in high-stress industrial applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance and a durable, non-reflective finish for extended service life in harsh environments.
• Class 3A thread fit offers superior precision and tighter tolerances, ensuring secure, vibration-resistant connections in critical assemblies.
• Fine UNF threads (1/4"-28) deliver improved clamping force and better load distribution, ideal for applications requiring fine adjustments and high torque.
• Fully threaded design allows for consistent engagement along the entire length, providing uniform stress distribution and versatile fastening options.
• Hex socket drive (3/16") enables easy installation in confined spaces with standard tools, reducing assembly time and improving efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting rigorous industry standards for dependable use.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening, corrosion, and high mechanical stress. The fine UNF threads and Class 3A fit provide precise, secure fastening in machinery, automotive, and aerospace components, where accuracy is critical. The high tensile strength and Rockwell C37 hardness ensure durability under heavy loads, while the black-oxide surface treatment resists rust and wear in demanding environments. Ideal for precision fastening in assembly lines, tooling, and equipment manufacturing, this screw minimizes maintenance needs and enhances operational reliability.

Specification Summary & Compliance

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