S-91251A912 1"-8 x 2" 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 applications, reducing the risk of fastener failure.
• Precise Class 3A thread fit provides superior engagement and vibration resistance, enhancing assembly integrity and longevity.
• Black-oxide coating on alloy steel offers corrosion resistance and a durable finish, ideal for harsh industrial environments.
• Rockwell C37 hardness delivers excellent wear resistance, maintaining thread integrity through repeated use.
• Coarse 1"-8 UNC threads allow for quicker installation and easier alignment, saving time in assembly processes.
• 3/4" hex drive socket head enables high-torque application with standard tools, ensuring secure fastening without stripping.
• Compliance with RoHS 3 and REACH guarantees environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this socket head cap screw combines black-oxide alloy steel with a fully threaded design to address common challenges like vibration loosening and corrosion. The coarse UNC threads and Class 3A fit ensure tight, reliable connections in heavy machinery, automotive assemblies, and construction equipment, reducing maintenance needs. Its high tensile strength and hardness make it suitable for dynamic loads, while the hex drive facilitates easy installation in confined spaces, streamlining production workflows and enhancing operational efficiency.

Specification Summary & Compliance

This screw adheres to ASTM A574 specifications, with precise 1"-8 UNC coarse threads and a Class 3A thread fit for accurate dimensional tolerance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental and safety regulations are upheld in industrial applications.