S-95198A267 2-56 x 7/8" 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 that withstands pressures up to 1500 psi, preventing leaks in critical applications
• Exceptional corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Precise Class 3A thread fit provides superior engagement and vibration resistance compared to standard Class 2A fittings
• High tensile strength of 100,000 psi delivers reliable performance under extreme mechanical loads and stress conditions
• Wide temperature compatibility from -40° to 225°F maintains sealing integrity across diverse operating environments
• Hex socket drive design allows for high torque application and secure installation in confined spaces
• Multiple international standard compliance ensures interchangeability and quality consistency across global projects

Professional Applications & Engineering Value

This 2-56 UNC Socket Head Cap Screw with integrated Buna-N rubber O-ring addresses critical sealing challenges in high-pressure industrial applications where fluid containment is paramount. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining 100,000 psi tensile strength, making it ideal for hydraulic systems, pneumatic equipment, and precision machinery requiring reliable sealing under demanding conditions. The Class 3A thread fit ensures superior engagement and vibration resistance, preventing loosening in dynamic applications. Engineered to withstand pressures up to 1500 psi and temperatures from -40° to 225°F, this fastener solves leakage issues in chemical processing, automotive, and aerospace assemblies where environmental sealing is critical for operational safety and equipment longevity.

Specification Summary & Compliance

Manufactured to ASME B18.3, DIN 912, and ISO 4762 standards with Class 3A thread fit precision for superior engagement. Features 2-56 UNC coarse threads with right-hand orientation and standard socket head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across international markets. The Buna-N rubber O-ring provides reliable sealing performance within specified temperature and pressure ranges while maintaining chemical compatibility with industrial fluids.