S-92198A922 1"-8 x 4 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 reducing maintenance costs.
• High-strength performance with 80,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing in demanding applications.
• Secure and efficient installation thanks to the external hex drive and 1 1/2" head width, allowing for high torque application.
• Excellent thread engagement with UNC coarse threading and Class 2A fit, enabling faster assembly and reduced cross-threading risk.
• Optimized for heavy-duty use with a 4 1/2" length and partial threading, providing strong clamping force where it's needed most.
• Guaranteed dimensional consistency as it meets ASME B18.2.1 specifications, ensuring interchangeability and reliable performance.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This 1"-8 UNC hex head screw is engineered to solve critical challenges in industrial assembly and construction. The 18-8 Stainless Steel material provides exceptional resistance to rust and corrosion, extending service life in outdoor, marine, or chemical-exposed settings. Its coarse thread (UNC) design ensures rapid installation and reliable holding power in wood, metal, and composite materials, reducing assembly time and labor costs. The partially threaded shank concentrates clamping force directly under the head, preventing joint loosening under vibration—a common failure point in machinery and structural frameworks. With an external hex drive and substantial head size, it accommodates high-torque tools for secure fastening in heavy-duty applications like equipment manufacturing, infrastructure projects, and transportation systems, delivering long-term reliability and reduced downtime.

Specification Summary & Compliance

This screw features a 1"-8 UNC thread with Class 2A dimensional tolerance, ensuring precise fit and interchangeability. It is manufactured in accordance with ASME B18.2.1 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial use.