S-95198A408 1/2"-20 x 1" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated Buna-N O-ring ensures reliable fluid and gas containment, preventing leaks in high-pressure systems up to 1500 psi.
• Exceptional Corrosion Resistance: 18-8 Stainless Steel construction offers excellent durability in harsh environments, reducing maintenance and replacement costs.
• High Tensile Strength for Demanding Applications: Withstands up to 100,000 psi tensile stress, providing secure fastening in high-load mechanical assemblies.
• Precision Thread Fit for Vibration Resistance: Class 3A UNF fine threads ensure tight, accurate engagement, minimizing loosening under dynamic conditions.
• Wide Temperature Compatibility: O-ring maintains sealing integrity across a broad range from -40° to 225° F, suitable for varied operational climates.
• Standardized Socket Drive for Efficient Installation: 3/8" hex drive allows for quick, secure tool engagement with common industrial wrenches.
• Full Thread Engagement for Maximum Grip: Fully threaded design provides consistent clamping force along the entire 1" length.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address critical sealing and strength challenges in industrial settings. The 18-8 Stainless Steel material provides inherent resistance to corrosion and oxidation, making it ideal for applications in chemical processing, marine equipment, and food machinery where moisture and contaminants are present. The inclusion of a Buna-N O-Ring is pivotal for creating a robust seal in hydraulic systems, pneumatic cylinders, and pump housings, effectively preventing fluid leakage and system failure under pressures up to 1500 psi. The UNF fine thread with Class 3A fit ensures minimal backlash and enhanced vibration resistance, crucial for precision assemblies in automotive and aerospace components. By combining high tensile strength with reliable sealing, this fastener reduces downtime and maintenance, delivering long-term operational efficiency.

Specification Summary & Compliance

This screw features a 1/2"-20 UNF thread with Class 3A precision fit, ensuring tight tolerances for secure fastening. It adheres to key manufacturing standards including ASME B18.3, DIN 912, and ISO 4762 for dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.