S-92198A533 7/8"-9 x 12 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 industrial environments and outdoor applications.
• High-strength performance with 80,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable load-bearing capacity and durability.
• Easy installation and removal thanks to the external hex drive and 1 5/16" head width, providing a secure grip for standard wrenches.
• Optimized for coarse threading (UNC) and Class 2A thread fit, enabling faster assembly and reduced risk of cross-threading in heavy-duty applications.
• Partial threading design allows for precise clamping force on specific sections, minimizing material stress in structural assemblies.
• Compliance with major standards including ASME B18.2.1, ensuring dimensional consistency, interchangeability, and engineering reliability.
• Environmental and safety compliance with RoHS 3 and REACH regulations, making it suitable for regulated industries and sustainable procurement.

Professional Applications & Engineering Value

This 7/8"-9 UNC hex head screw is engineered to address critical challenges in heavy-duty industrial applications, such as structural steel framing, machinery assembly, and large-scale construction projects. The 18-8 stainless steel material provides excellent resistance to rust and oxidation, extending service life in demanding environments. With a coarse thread (UNC) and Class 2A thread fit, it ensures quick, secure fastening with reduced installation time and lower risk of thread damage. The partial threading design concentrates clamping force where needed, preventing joint loosening under vibration or dynamic loads. Its external hex drive and substantial head size offer high torque capability, making it a reliable choice for applications requiring robust, long-lasting connections.

Specification Summary & Compliance

This screw features a 7/8"-9 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy and interchangeability. It is manufactured in compliance with ASME B18.2.1 specifications, ensuring consistent quality and performance. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.