S-90201A535 5/8"-11 x 2 1/4" 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 applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments.
- High hardness rating (Rockwell C38) provides excellent wear resistance and durability under repetitive loads.
- Partial UNC threading with Class 2A fit offers easy assembly and secure fastening in coarse-thread applications.
- External hex drive design allows for high-torque installation with standard tools, improving installation efficiency.
- Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory acceptance in global markets.
- Grade 9 strength classification guarantees consistent quality for critical heavy-duty and structural fastening needs.
Professional Applications & Engineering Value
This Grade 9 hex head screw is engineered to address demanding industrial challenges where high tensile strength and corrosion resistance are paramount. The steel construction combined with zinc yellow-chromate plating provides a robust barrier against oxidation, making it ideal for outdoor machinery, construction equipment, and automotive assemblies exposed to moisture and chemicals. The 5/8"-11 UNC coarse thread and partial threading design enhance grip in softer materials and prevent loosening under vibration, while the external hex drive facilitates quick, high-torque installations. These features collectively reduce maintenance frequency and increase operational reliability in heavy-duty applications, ensuring long-term structural integrity and cost-effectiveness for B2B users.
Specification Summary & Compliance
This fastener adheres to precise inch system dimensions, including a 2 1/4" length and Class 2A thread fit for consistent accuracy. It meets UNC coarse thread standards and is manufactured to Grade 9 strength specifications, ensuring compatibility with industrial requirements. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.
