S-90841A230 8-32 x 1" 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 industrial environments.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-lasting performance.
• Precise, secure fastening ensured by Class 3A thread fit and UNC coarse thread profile, reducing the risk of cross-threading.
• High vacuum compatibility rating makes these screws suitable for vacuum chamber and cleanroom applications.
• Efficient pressure equalization via the integrated vent and 0.042" vent diameter, preventing pressure buildup.
• Easy installation and removal with a standard 9/64" hex drive, providing a secure grip and reducing tool slippage.
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical challenges in demanding industrial settings. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it a durable choice for machinery, marine equipment, and chemical processing applications. The UNC coarse thread and Class 3A thread fit ensure quick assembly and a secure, vibration-resistant connection, which is vital for maintaining integrity in dynamic systems. Its high vacuum rating is particularly valuable in aerospace, semiconductor manufacturing, and scientific instrumentation, where atmospheric integrity is paramount. The inclusion of a vented feature further enhances its utility in pressurized assemblies, preventing potential failure due to trapped air or moisture. This combination of material properties, thread precision, and specialized screw features delivers reliable performance, reduces maintenance needs, and supports efficient production workflows.

Specification Summary & Compliance

This product adheres to a Class 3A thread fit for high precision and meets the dimensional requirements of the ASME B18.3 standard. It is manufactured with UNC coarse threads and is fully threaded for consistent engagement. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) is confirmed, ensuring the screw is free of hazardous substances and safe for various industrial and international markets.