S-92198A808 5/8"-11 x 3 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness, ensuring high load-bearing capacity and resistance to deformation.
• Secure and efficient fastening provided by the UNC coarse thread and Class 2A thread fit, enabling quick assembly and reliable hold in a variety of materials.
• Optimized for high-torque applications with an external hex drive and hex head design, allowing for easy installation with standard tools.
• Versatile partial threading offers an unthreaded shank for precise clamping and shear strength where needed.
• Compliance with major industry standards including ASME B18.2.1, ensuring dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This 5/8"-11 UNC hex head screw is engineered to address critical fastening challenges in demanding industrial applications. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for outdoor, marine, and chemical processing environments where durability is paramount. The coarse thread design ensures rapid installation and reliable performance in soft materials or where vibration resistance is needed. With an external hex drive and robust head, it withstands high torque during assembly, reducing the risk of stripping. The partially threaded configuration enhances shear strength and prevents loosening under dynamic loads, offering a secure solution for structural frameworks, heavy machinery, and construction projects that require a balance of strength and precise clamping force.

Specification Summary & Compliance

This hex head screw features a 5/8"-11 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. It is manufactured in compliance with ASME B18.2.1 specifications, ensuring consistent dimensions and performance. The product is also certified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.