S-95198A321 10-32 x 1/4" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated Buna-N rubber O-ring provides reliable leak-proof sealing up to 1500 psi, ideal for hydraulic and pneumatic systems.
• Exceptional Corrosion Resistance: 18-8 stainless steel construction ensures long-lasting durability in harsh environments, reducing maintenance costs.
• High Tensile Strength: Withstands 100,000 psi tensile loads, offering reliable fastening in high-stress industrial applications.
• Precision Thread Fit: Class 3A UNF fine threads deliver superior vibration resistance and secure mating in critical assemblies.
• Wide Temperature Tolerance: Maintains sealing integrity across -40° to 225°F range, suitable for extreme operating conditions.
• Standardized Socket Drive: Hex drive design (5/32") ensures compatibility with common tools and prevents stripping during installation.
• Full Thread Engagement: Fully threaded shank provides maximum grip length and uniform stress distribution.

Professional Applications & Engineering Value

This socket head cap screw with Buna-N O-ring sealing addresses critical leakage challenges in precision engineering applications. The 18-8 stainless steel material combined with Class 3A UNF fine threads creates a robust sealing solution for hydraulic systems, pneumatic cylinders, and fluid handling equipment where pressure integrity is paramount. The fully threaded design ensures consistent clamping force across the entire engagement length, while the standardized hex socket drive prevents cam-out during high-torque installations. Engineers specify this fastener for applications requiring reliable performance under 1500 psi pressure and extreme temperature fluctuations from -40° to 225°F, making it ideal for automotive, aerospace, and industrial machinery where failure is not an option.

Specification Summary & Compliance

Manufactured to ASME B18.3, DIN 912, and ISO 4762 standards with Class 3A thread fit precision. Features 10-32 UNF fine threads with right-hand orientation and 1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The Buna-N rubber O-ring meets temperature specifications from -40° to 225°F while maintaining sealing effectiveness.