S-92620A337 1 1/4"-7 x 10" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capability: With a tensile strength of 150,000 psi, this screw reliably handles extreme stress in heavy machinery and structural applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance: The zinc yellow-chromate plating provides a durable barrier against rust and environmental degradation, extending service life in harsh industrial or outdoor settings.
• High-Strength Material Construction: Made from Grade 8 steel and hardened to Rockwell C33, it offers excellent resistance to wear, deformation, and shear forces under high-torque conditions.
• Optimized for Quick Assembly: The coarse UNC threading and Class 2A fit enable faster installation and secure engagement, minimizing assembly time while maintaining precision.
• Robust Drive Design: The external hex head and 1 7/8" width allow for high torque application with standard tools, ensuring tight fastening without stripping.
• Versatile Partial Threading: The 3" minimum threaded section provides strong clamping force on thick materials, while the unthreaded shank adds shear resistance.
• Compliance with Industry Standards: Meets ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality, interchangeability, and reliability in professional applications.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial and construction environments, where joint integrity under dynamic loads is paramount. The 1 1/4"-7 UNC coarse thread with Class 2A fit ensures rapid, secure fastening in structural steel, machinery bases, and large equipment assemblies, reducing installation time while preventing loosening from vibration. The zinc yellow-chromate plating combats corrosion in exposed or humid conditions, crucial for outdoor infrastructure and marine applications. With a 10" length and partial threading, it provides optimal clamp load distribution and shear strength in thick materials, making it ideal for bolting heavy frames, supports, and high-stress connections where reliability cannot be compromised.

Specification Summary & Compliance

This fastener adheres to precise dimensional and performance criteria, including UNC coarse threads with Class 2A thread fit for consistent engagement and interchangeability. It conforms to ASME B18.2.1 and SAE J429 standards, ensuring mechanical properties and manufacturing quality. The screw is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental regulations for hazardous substance restrictions and chemical safety in industrial supply chains.