S-90201A122 1/4"-20 x 3" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 180,000 PSI ensures reliable performance in high-stress industrial environments, reducing the risk of fastener failure.
• Rockwell C38 hardness rating provides superior resistance to wear and deformation, extending the screw's service life in demanding applications.
• Zinc yellow-chromate plating offers excellent corrosion resistance, protecting against rust and environmental damage in harsh conditions.
• Partially threaded UNC coarse design with Class 2A fit allows for easier alignment and faster installation while maintaining secure, vibration-resistant connections.
• External hex drive and hex head design enables high-torque application with standard tools, ensuring tight, stable fastening in heavy-duty assemblies.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and material integrity, meeting global standards for industrial use.
• Grade 9 strength classification delivers consistent quality and durability, ideal for critical applications where reliability is paramount.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 9 hex head screw addresses common challenges like vibration loosening and material fatigue. The steel construction with zinc yellow-chromate plating combats corrosion in outdoor or chemically exposed settings, while the UNC coarse thread and partial threading enhance grip and reduce installation time in thick materials. With an external hex drive, it supports high torque for secure fastening in machinery, construction, and automotive assemblies, ensuring long-term stability and reducing maintenance needs. This screw is a trusted solution for projects requiring high tensile strength and durability without compromising on regulatory compliance.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, ensuring consistent performance. It adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming its compliance with environmental and safety regulations. Manufactured to meet Grade 9 strength requirements, it includes specifications such as a 3" length, partial threading, and inch system measurements for reliable integration into various industrial fastening systems.