S-95198A332 1/4"-20 x 3/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring for reliable leak prevention in demanding environments
• Exceptional corrosion resistance thanks to 18-8 stainless steel construction, ensuring long-term durability in harsh conditions
• Precise Class 3A thread fit for secure fastening with minimal play, reducing vibration-related failures
• High-pressure capability withstands up to 1500 psi, making it ideal for hydraulic and pneumatic applications
• Wide temperature tolerance from -40° to 225°F maintains performance across extreme operating conditions
• Robust mechanical strength with 100,000 psi tensile strength and Rockwell B85 hardness for heavy-duty applications
• Universal compatibility with UNC coarse threading and hex drive design for easy installation with standard tools

Professional Applications & Engineering Value

This socket head cap screw delivers exceptional engineering value through its integrated sealing capability and robust 18-8 stainless steel construction. The combination of Buna-N rubber O-ring and Class 3A UNC thread fit addresses critical industrial challenges by preventing fluid and gas leakage in high-pressure systems up to 1500 psi. The fully threaded design ensures maximum engagement strength, while the coarse threading provides rapid assembly in manufacturing environments. Ideal for hydraulic equipment, pneumatic systems, and machinery requiring reliable pressure sealing, this fastener maintains integrity across temperature extremes from -40° to 225°F, offering engineers a dependable solution for demanding applications where vibration resistance and environmental sealing are paramount.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit standards with UNC coarse threading (1/4"-20), this socket head cap screw meets rigorous dimensional specifications per ASME B18.3, DIN 912, and ISO 4762 standards. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. With 100,000 psi tensile strength and Rockwell B85 hardness, it delivers consistent performance while maintaining dimensional accuracy for reliable installation in precision applications.