S-92198A838 5/8"-11 x 16" 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 tensile strength of 80,000 psi ensures reliable performance under heavy loads and prevents failure in demanding applications.
• Rockwell B70 hardness provides excellent durability and resistance to wear, extending the service life of the fastener.
• Coarse UNC thread and Class 2A fit enable faster assembly, easier alignment, and reliable engagement in a variety of materials.
• External hex drive and hex head design allow for high-torque installation with standard tools, simplifying maintenance and reducing installation time.
• Partially threaded shank provides an unthreaded bearing surface for improved shear strength and more precise clamping.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees consistent quality, safety, and environmental responsibility for global projects.

Professional Applications & Engineering Value

This 5/8"-11 UNC hex head screw is engineered to solve critical challenges in heavy-duty industrial applications, including structural steel framing, machinery assembly, and construction projects. The 18-8 Stainless Steel material offers exceptional corrosion resistance, eliminating premature failure in humid or chemically aggressive environments. The coarse thread and Class 2A thread fit ensure quick, secure fastening even in materials where fine threads might strip, while the partially threaded design concentrates clamping force effectively, reducing the risk of joint loosening under vibration. With an external hex drive, it supports high-torque installation, making it a reliable choice for applications demanding both strength and ease of maintenance.

Specification Summary & Compliance

This screw features a 5/8"-11 UNC coarse thread with a Class 2A thread fit for standard tolerance and reliable engagement. It is manufactured to meet ASME B18.2.1 specifications, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in environmentally sensitive and regulated industries.