S-92198A901 7/8"-9 x 9" 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.
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B70 hardness for demanding applications.
• Optimized for high-torque installation with an external hex drive and large 1 5/16" head width for secure fastening.
• Reliable coarse UNC threading (7/8"-9) ensures quick assembly and reduced cross-threading risk in industrial settings.
• Precision Class 2A thread fit guarantees consistent engagement and vibration resistance in assembled structures.
• Versatile partially threaded design provides unthreaded shank strength where needed, enhancing clamp load distribution.
• Full regulatory compliance with ASME B18.2.1, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

This heavy-duty hex head screw is engineered to address critical challenges in industrial assembly, where corrosion resistance and high tensile strength are paramount. The 18-8 Stainless Steel material prevents rust and degradation in moist or chemical-exposed environments, extending service life. Its coarse UNC thread and Class 2A fit facilitate rapid installation while maintaining tight tolerances, reducing assembly time and minimizing failure risks in machinery, structural frames, and heavy equipment. The partially threaded configuration ensures that the unthreaded portion bears shear loads effectively, making it ideal for bolted connections requiring both clamping force and alignment stability. Compliant with ASME B18.2.1, it delivers consistent performance in construction, manufacturing, and marine applications, providing engineers with a reliable, standards-backed fastening solution.

Specification Summary & Compliance

This screw adheres to precise inch system dimensions, including a 9" length and 7/8"-9 UNC coarse thread with Class 2A tolerance for reliable fit. Manufacturing follows ASME B18.2.1 specifications, ensuring dimensional accuracy and performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.