S-90201A654 3/4"-10 x 4" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 180,000 PSI provides superior resistance to breaking and stripping under extreme loads, ensuring long-term structural integrity.
• Class 2A thread fit with UNC coarse threading offers reliable, easy installation and removal, reducing assembly time and labor costs.
• Zinc yellow-chromate plating delivers excellent corrosion resistance, protecting the fastener in harsh industrial environments and extending service life.
• Grade 9 strength classification and Rockwell C38 hardness guarantee high durability and wear resistance for heavy-duty applications.
• Partially threaded design allows for secure clamping on specific sections, providing precise load distribution and vibration resistance.
• External hex drive and 1 1/8" head width enable high-torque installation with standard tools, ensuring a tight, reliable fit.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global industrial supply chains.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 9 hex head screw addresses critical challenges in machinery assembly, structural steel connections, and high-stress equipment. The steel material combined with zinc yellow-chromate plating provides robust protection against rust and chemical exposure, making it ideal for outdoor or corrosive environments. The 3/4"-10 UNC coarse thread and Class 2A fit ensure quick, secure fastening in thick materials, reducing the risk of cross-threading. With a 4" length and partial threading, it offers optimal grip and clamping force, preventing joint failure in vibrating systems. These features deliver reliable performance in construction, manufacturing, and automotive sectors, where high tensile strength and corrosion resistance are paramount for safety and longevity.

Specification Summary & Compliance

This fastener adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It meets Grade 9 mechanical properties, including 180,000 PSI tensile strength and Rockwell C38 hardness. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for environmentally conscious industrial use.