S-92198A594 1"-8 x 20" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• Superior load-bearing capacity with 80,000 psi tensile strength for heavy-duty applications requiring maximum structural integrity
• Optimized thread engagement through UNC coarse threading with Class 2A fit, providing secure fastening and reduced cross-threading risk
• Enhanced installation efficiency with external hex drive and 1 1/2" head width for high-torque application using standard tools
• Reliable mechanical performance maintained through Rockwell B70 hardness, resisting deformation under extreme pressure
• Versatile partial threading design allowing both secure clamping and smooth shank sections for precise component alignment
• Full regulatory compliance meeting ASME B18.2.1 specifications and international environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This heavy-duty hex head screw delivers critical engineering solutions where structural integrity and corrosion resistance are paramount. The 18-8 stainless steel composition provides exceptional protection against rust and chemical degradation in demanding environments such as marine installations, chemical processing equipment, and outdoor structural frameworks. The 1"-8 UNC coarse thread configuration ensures rapid installation and superior vibration resistance, while the partial threading design allows for precise load distribution across connected components. With 80,000 psi tensile strength and Rockwell B70 hardness, this fastener maintains clamping force under extreme mechanical stress, preventing joint failure in critical infrastructure, heavy machinery assembly, and industrial construction applications where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 standards with Class 2A thread fit tolerances ensuring precise dimensional accuracy and interchangeability. The 1"-8 UNC coarse thread maintains consistent pitch and profile throughout the 2 1/2" minimum thread length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage across global markets. The inch system measurements provide compatibility with North American industrial specifications while maintaining international quality benchmarks for heavy-duty fastening applications.