S-92198A893 7/8"-9 x 5 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• High-strength performance offering 80,000 psi tensile strength and Rockwell B70 hardness for demanding heavy-duty applications.
• Secure and reliable fastening ensured by the Class 2A thread fit and coarse UNC thread, providing excellent grip and vibration resistance.
• Optimized for high-torque installation thanks to the external hex drive and large 1 5/16" head width, allowing for easy wrench access and tightening.
• Versatile partial threading design with a minimum 2" thread length, offering flexibility in clamping and reducing thread galling risks.
• Industry-standard compliance with ASME B18.2.1 specifications, ensuring dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory standards for industrial use.

Professional Applications & Engineering Value

This 7/8"-9 UNC hex head screw is engineered to solve critical fastening challenges in heavy machinery, structural steelwork, and industrial equipment assembly. The 18-8 Stainless Steel material provides excellent resistance to rust and chemical exposure, making it suitable for outdoor, marine, or chemical processing environments where corrosion is a concern. The coarse thread and Class 2A fit ensure quick assembly and reliable holding power, even under dynamic loads or vibration. Its partially threaded shank allows for precise clamping force distribution, reducing stress concentration and preventing joint failure. With an external hex drive and substantial head dimensions, it supports high-torque applications without stripping, delivering consistent performance in construction, manufacturing, and infrastructure projects.

Specification Summary & Compliance

This hex head screw features a 7/8"-9 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It is manufactured in accordance with ASME B18.2.1 specifications, ensuring precise dimensional control and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial fasteners.