S-95198A334 1/4"-20 x 5/8" 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 sealing up to 1500 psi, preventing leaks in high-pressure applications
• Exceptional Corrosion Resistance - 18-8 Stainless Steel construction ensures long-lasting performance in harsh environments and corrosive conditions
• Precise Thread Engagement - Class 3A UNC coarse thread fit delivers superior vibration resistance and secure fastening in demanding applications
• Wide Temperature Tolerance - Maintains sealing integrity across extreme temperatures from -40° to 225°F for versatile industrial use
• High Tensile Strength - 100,000 psi tensile strength provides reliable structural integrity under heavy loads and stress conditions
• Standardized Compatibility - Meets ASME B18.3, DIN 912, and ISO 4762 specifications for global engineering compatibility and interchangeability
• Secure Hex Drive Design - 3/16" hex socket drive allows for high torque application and prevents stripping in critical assemblies

Professional Applications & Engineering Value

This socket head cap screw with integrated Buna-N rubber O-ring addresses critical sealing challenges in industrial applications where fluid containment and pressure integrity are paramount. The 18-8 stainless steel construction provides excellent corrosion resistance for harsh environments, while the Class 3A UNC coarse thread ensures precise fit and superior vibration resistance in machinery, hydraulic systems, and pneumatic equipment. Engineered for high-pressure applications up to 1500 psi, this fully threaded fastener delivers reliable sealing performance in pump assemblies, valve systems, and fluid power components where temperature fluctuations from -40° to 225°F would compromise ordinary fasteners. The standardized socket head design with hex drive facilitates easy installation in confined spaces while maintaining the structural integrity required for demanding industrial applications.

Specification Summary & Compliance

This 1/4"-20 x 5/8" socket head cap screw features precision UNC coarse threads with Class 3A fit for superior dimensional accuracy and thread engagement. Manufactured to exacting ASME B18.3, DIN 912, and ISO 4762 standards, ensuring global compatibility and performance reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations, meeting the latest chemical substance restrictions for industrial applications worldwide. The Rockwell B85 hardness rating and 100,000 psi tensile strength guarantee mechanical performance consistency across production batches and application requirements.