S-90201A651 3/4"-10 x 3 1/2" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 180,000 PSI tensile strength for reliable performance in high-stress applications.
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments.
• High hardness rating of Rockwell C38 ensures durability and resistance to wear and deformation.
• Optimized clamping force due to partial threading, preventing loosening under vibration and dynamic loads.
• Easy installation and removal with external hex drive and coarse UNC threads for quick assembly in industrial settings.
• Precise thread fit with Class 2A tolerance, ensuring consistent engagement and reduced risk of cross-threading.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains.

Professional Applications & Engineering Value

This Grade 9 hex head screw is engineered to address critical challenges in heavy machinery, construction, and structural assemblies where failure is not an option. The steel material combined with zinc yellow-chromate plating offers robust protection against rust and chemical exposure, ideal for outdoor or corrosive environments. Its 3/4"-10 UNC coarse thread and partial threading design enhance grip and distribute stress evenly, reducing the risk of joint fatigue. With a 3 1/2" length and external hex drive, it provides secure fastening in thick materials, ensuring long-term reliability for industrial fastening needs without compromising on safety or efficiency.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy. It meets Grade 9 strength classification and is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial applications.