S-90201A642 3/4"-10 x 2 1/4" Extreme-Strength Grade 9 Steel Hex Head Screws

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 with zinc yellow-chromate plating extends service life in harsh industrial environments.
• High hardness rating of Rockwell C38 provides excellent wear resistance and maintains thread integrity under heavy loads.
• Full threading design offers maximum grip and uniform load distribution along the entire length for secure fastening.
• Coarse UNC thread pattern enables quick installation and reduces cross-threading risks in demanding assembly operations.
• Precise Class 2A thread fit ensures consistent engagement and reliable performance in repetitive applications.
• Heavy-duty Grade 9 classification guarantees compliance with rigorous industrial standards for critical fastening requirements.

Professional Applications & Engineering Value

This Grade 9 hex head screw delivers exceptional engineering value through its high-strength steel construction and zinc yellow-chromate plating, specifically designed to address common industrial challenges. The combination of 180,000 PSI tensile strength and Rockwell C38 hardness makes it ideal for heavy machinery, structural steel connections, and equipment subjected to extreme vibration and dynamic loads. The coarse UNC thread pattern ensures rapid assembly in field applications while maintaining secure fastening in high-vibration environments. The external hex drive provides superior torque transmission during installation, preventing tool slippage and ensuring proper clamping force. This fully threaded fastener offers maximum thread engagement for critical joints in construction, manufacturing, and heavy equipment maintenance applications where reliability is paramount.

Specification Summary & Compliance

This 3/4"-10 hex head screw features precise Class 2A thread fit with UNC coarse threading and right-hand thread direction. Manufactured to Grade 9 strength specifications with dimensions of 2 1/4" length, 1 1/8" head width, and 9/16" head height. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial applications worldwide.