S-90201A443 1/2"-13 x 4 1/2" Extreme-Strength Grade 9 Steel Hex Head Screws
Extreme-Strength Grade 9 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 180,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness rating (Rockwell C38) provides excellent wear resistance and durability under heavy loads and repeated use.
- Coarse UNC threading with Class 2A fit allows for faster assembly and secure fastening, improving installation efficiency.
- Partially threaded design offers optimal clamping force distribution, ideal for applications requiring precise joint integrity.
- External hex drive and hex head enable easy installation with standard tools, reducing labor time and enhancing workplace safety.
- Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory adherence for global industrial use.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this Grade 9 hex head screw addresses critical challenges in construction, machinery, and heavy equipment where high tensile strength and corrosion resistance are paramount. The steel material combined with zinc yellow-chromate plating effectively combats rust and degradation in outdoor or chemically exposed settings, prolonging component life. Its coarse UNC thread and Class 2A fit ensure quick, secure fastening even in vibrating environments, reducing loosening risks. The partially threaded configuration provides focused clamping force, making it ideal for structural assemblies that require reliable, long-term performance without frequent re-tightening.
Specification Summary & Compliance
This fastener adheres to precise dimensional standards, including UNC coarse threads with Class 2A thread fit for consistent accuracy and interchangeability. It meets Grade 9 strength classification, supporting rigorous engineering requirements. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets international environmental and safety regulations for hazardous substances.
