S-91251A689 7/16"-14 x 5 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 extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from the black-oxide finish protects against rust and wear, extending service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight, secure connections with minimal play, enhancing assembly accuracy and vibration resistance.
• High hardness rating (Rockwell C37) provides excellent durability and resistance to deformation, maintaining integrity during repeated use.
• Coarse UNC threading allows for faster installation and easier alignment, saving time in high-volume production settings.
• 3/8" hex drive design offers secure tool engagement and high torque capability, preventing stripping and improving installation efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety, meeting rigorous industry and regulatory standards.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common challenges in heavy-duty applications, such as industrial machinery, automotive assemblies, and construction projects. The alloy steel construction combined with a black-oxide surface treatment provides robust protection against corrosion and mechanical stress, reducing maintenance needs in demanding environments. Its UNC coarse threads and Class 3A fit ensure quick, reliable fastening with high resistance to loosening under vibration, making it ideal for equipment subjected to dynamic loads. By integrating high tensile strength and precise thread specifications, this fastener delivers consistent performance, minimizing downtime and enhancing operational safety in critical engineering systems.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy under UNC coarse threading standards. It meets ASTM A574 manufacturing specifications for high-strength socket head cap screws, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental and safety standards in global supply chains.