S-90044A293 4-48 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the Black-Oxide finish prolongs service life in harsh environments, minimizing maintenance needs and replacement costs.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
• Fine UNF threads provide improved load distribution and better sealing capabilities compared to coarse threads, ideal for precision engineering.
• Partially threaded design allows for controlled clamping force and easier alignment in assemblies, speeding up installation and improving accuracy.
• Hex socket drive enables high-torque application with standard tools, reducing stripping and enabling efficient use in confined spaces.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and suitability for regulated industries.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel socket head cap screw is engineered to address critical challenges in precision machinery, automotive, and aerospace sectors where corrosion resistance and high tensile strength are paramount. The 4-48 UNF fine thread design offers superior fatigue resistance and secure fastening in vibratory environments, reducing the need for frequent retightening. With a Rockwell C37 hardness and partially threaded configuration, it provides optimal stress distribution and ease of installation in assemblies requiring exact thread engagement. Ideal for applications demanding ASTM A574 compliance, this screw ensures durability in high-load conditions while meeting stringent industry standards for performance and safety.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit tolerances for precise engagement and is manufactured in accordance with ASTM A574 specifications for high-strength alloy steel fasteners. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. The UNF fine thread and inch-based dimensions guarantee compatibility with standard industrial systems, supporting consistent performance in engineered applications.