S-92620A954 1"-8 x 2 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength and Grade 8 classification, ensuring reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding industrial environments
• Optimized thread engagement through 1"-8 UNC coarse threading and Class 2A fit, enabling faster installation and reduced cross-threading risks
• Enhanced driving efficiency with external hex drive and substantial 1 1/2" head width, allowing for high torque application and secure fastening
• Maximum thread coverage through full threading along the 2 1/4" length, providing consistent clamping force across the entire fastener
• Robust material integrity with Rockwell C33 hardness, maintaining structural stability under heavy mechanical loads
• Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 standards, guaranteeing quality and interoperability in industrial systems

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and reliable fastening are paramount. The steel construction with Rockwell C33 hardness ensures dimensional stability under extreme loads, while the zinc yellow-chromate plating provides essential corrosion protection in harsh operating environments. The 1"-8 UNC coarse thread design facilitates rapid installation in structural steel, manufacturing equipment, and automotive applications, reducing assembly time while maintaining Class 2A thread fit precision. The external hex drive configuration allows for high-torque application, making these fully threaded fasteners ideal for critical joints requiring uniform stress distribution across the entire 2 1/4" length.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit with 1"-8 UNC coarse threading in right-hand direction, manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications. The fastener maintains dimensional accuracy with 1" thread diameter and 2 1/4" length in the inch measurement system. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety standards are met for industrial applications.