S-90841A250 1/4"-20 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 environments and preventing material degradation
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high stress
• High vacuum compatibility with a vented design (0.063" vent diameter) to prevent outgassing and ensure integrity in vacuum systems
• Precise and secure fastening achieved with a Class 3A thread fit and UNC coarse thread for easy assembly and vibration resistance
• Durable and efficient installation using a standard 3/16" hex drive, providing high torque capability and reduced risk of stripping
• Full-length threading ensures maximum grip and adjustability across the entire 1" length for versatile application use
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence

Professional Applications & Engineering Value

This 18-8 stainless steel socket head cap screw is engineered to address critical challenges in demanding sectors such as aerospace, semiconductor manufacturing, and high-precision machinery. Its high vacuum rating and vented screw design mitigate outgassing risks, essential for maintaining vacuum integrity in sensitive equipment. The UNC coarse thread and Class 3A thread fit provide superior holding power and ease of installation, reducing assembly time and preventing loosening under vibration. Made from corrosion-resistant 18-8 stainless steel, it ensures long-term durability in corrosive or high-moisture environments, while the hex socket drive allows for compact spaces and high-torque applications, making it a reliable choice for engineers seeking performance and compliance.

Specification Summary & Compliance

This socket head cap screw features precise UNC 1/4"-20 coarse threads with a Class 3A fit for accurate engagement and strength. It adheres to ASME B18.3 manufacturing specifications, ensuring dimensional consistency and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use.