S-90201A416 1/2"-13 x 1 1/4" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 180,000 PSI ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior hardness rating of Rockwell C38 provides excellent resistance to wear and deformation, extending service life in high-stress environments.
• Zinc yellow-chromate plating offers enhanced corrosion resistance, protecting against rust and maintaining integrity in harsh industrial conditions.
• UNC coarse threading with Class 2A fit allows for faster assembly and easier alignment, minimizing installation time and labor costs.
• External hex drive design enables secure tool engagement and high torque application, ensuring tight fastening without stripping.
• Full threading along the 1-1/4" length provides consistent grip and load distribution, improving joint stability in heavy-duty structures.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and material reliability, meeting global industry standards for responsible sourcing.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 9 hex head screw addresses common challenges in construction, machinery, and structural assemblies where high vibration and dynamic loads are present. The steel material combined with zinc yellow-chromate plating resists corrosion in outdoor or chemically exposed settings, while the UNC coarse thread and Class 2A fit ensure quick, secure fastening even in misaligned holes. Its 180,000 PSI tensile strength and Rockwell C38 hardness prevent shear and tensile failures, making it ideal for critical connections in automotive frames, industrial equipment, and infrastructure projects where durability and safety are paramount.

Specification Summary & Compliance

This fastener features a 1/2"-13 UNC coarse thread with Class 2A thread fit for standard tolerance and interchangeability. Manufacturing adheres to inch system specifications, including a 1-1/4" length, 3/4" head width, and external hex drive. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no restricted substances are used and supporting sustainable industrial practices.