S-90201A531 5/8"-11 x 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 repetitive use.
- Coarse UNC threads with Class 2A fit allow for quick, easy installation and secure fastening in a wide range of materials.
- Full threading along the 2" length ensures maximum grip and uniform load distribution, enhancing joint integrity.
- External hex drive design offers straightforward installation with common tools, improving assembly efficiency and reducing labor time.
- Compliance with RoHS 3 and REACH standards guarantees environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this Grade 9 hex head screw combines high-strength steel and a zinc yellow-chromate finish to address common challenges like vibration loosening and corrosion in machinery, construction, and heavy equipment. The UNC coarse thread and Class 2A fit provide reliable engagement in coarse-grained materials, reducing cross-threading risks and ensuring stable connections under dynamic loads. With a fully threaded design and external hex drive, it streamlines assembly in tight spaces, making it ideal for structural frameworks, automotive components, and manufacturing systems where durability and compliance with RoHS and REACH are critical for long-term performance.
Specification Summary & Compliance
This fastener adheres to precise inch system dimensions, including a 5/8"-11 UNC coarse thread with Class 2A tolerance for consistent fit. It meets Grade 9 strength specifications, backed by 180,000 psi tensile strength and Rockwell C38 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for international industrial use.
