S-95198A340 1/4"-20 x 1 1/2" 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 provides reliable fluid and gas sealing up to 1500 psi, preventing leaks in demanding applications
• Exceptional Corrosion Resistance – 18-8 stainless steel construction offers excellent protection against rust and chemical degradation in harsh environments
• High Strength Reliability – 100,000 psi tensile strength and Rockwell B85 hardness ensure dependable performance under extreme mechanical stress
• Precision Thread Engagement – Class 3A thread fit with UNC coarse threading delivers superior fastening accuracy and vibration resistance
• Wide Temperature Compatibility – Buna-N O-ring maintains sealing integrity across broad temperature range from -40°F to 225°F
• Space-Saving Installation – Socket head design with hex drive allows for compact installation in confined spaces while providing high torque capability
• Industry Standard Compliance – Meets multiple international standards for consistent quality and interchangeability across global projects

Professional Applications & Engineering Value

This socket head cap screw with integrated Buna-N O-ring addresses critical sealing challenges in hydraulic systems, pneumatic equipment, and fluid processing applications. The 18-8 stainless steel construction provides essential corrosion resistance for marine, chemical processing, and outdoor industrial environments where moisture and corrosive agents are present. The Class 3A thread fit with UNC coarse threading ensures rapid assembly and superior vibration resistance in high-cycle applications. Engineers specify this sealing cap screw for pressure vessels, pump housings, and compressor assemblies where the 1500 psi pressure rating and temperature resilience prevent system failures and maintenance downtime. The combination of fully threaded design and hex drive socket head enables precise torque application and uniform clamping force distribution across the entire fastener length.

Specification Summary & Compliance

This 1/4"-20 UNC socket head cap screw features Class 3A thread fit precision manufacturing with right-hand thread direction and coarse thread spacing. The fastener maintains dimensional compliance with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring international compatibility. Environmental and safety compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The fully threaded design provides consistent engagement while the standard socket head profile accommodates 3/16" hex drive tools for secure installation.