S-90841A180 8-32 x 3/4" ASME B18.3 High-Vacuum Cleaned-and-Bagged Vented Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for high-stress applications.
• Reliable high-vacuum performance with a specialized vented design to prevent outgassing in sensitive vacuum systems.
• Precise and secure fastening ensured by Class 3A thread fit and UNC coarse threads for easy assembly and vibration resistance.
• Optimized for industrial use with full threading and a standard hex socket head for high torque application and deep-set access.
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
• Durable and consistent performance from controlled manufacturing, providing dependable fastening in critical assemblies.

Professional Applications & Engineering Value

This 8-32 UNC thread socket head cap screw is engineered to solve critical fastening challenges in demanding sectors. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for outdoor, marine, and chemical processing equipment. Its high vacuum rating and vented design are crucial for applications in aerospace, semiconductor manufacturing, and scientific instruments, where trapped air or contaminants can compromise system integrity. The Class 3A thread fit and coarse thread spacing ensure quick, secure installation and superior resistance to loosening under vibration, which is vital in machinery, automotive assemblies, and heavy-duty industrial frames. By integrating these features, the screw enhances assembly efficiency, reduces maintenance needs, and supports long-term operational reliability in precision engineering environments.

Specification Summary & Compliance

This socket head cap screw adheres to precise dimensional and performance criteria, including a Class 3A thread fit for tight tolerances and a UNC coarse thread with 8-32 size. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and interchangeability. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial and international markets.