S-90201A111 1/4"-20 x 3/4" 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 or outdoor environments.
- High hardness rating (Rockwell C38) provides excellent wear resistance and durability under repetitive loads.
- Coarse UNC threading with Class 2A fit allows for quick assembly and secure fastening, minimizing cross-threading issues.
- External hex drive design offers easy installation and removal with standard tools, improving maintenance efficiency.
- Full threading along the 3/4" length ensures maximum grip and uniform load distribution across the fastened joint.
- Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in industrial settings.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this Grade 9 hex head screw combines high-strength steel construction with a zinc yellow-chromate finish to combat corrosion in machinery, structural assemblies, and outdoor equipment. The coarse UNC thread pattern and Class 2A fit provide rapid, secure fastening even in vibrating conditions, reducing maintenance downtime. With a fully threaded design and external hex drive, it delivers consistent clamping force and easy access in confined spaces, making it ideal for heavy-duty applications in construction, automotive, and manufacturing sectors where reliability and compliance are critical.
Specification Summary & Compliance
This fastener adheres to precise dimensional standards, including 1/4"-20 UNC coarse threads with Class 2A thread fit for consistent accuracy. Manufactured from high-grade steel, it meets Grade 9 strength requirements and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability.
