S-95198A402 1/2"-13 x 1 1/8" 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 ensures reliable fluid and gas containment, preventing leaks in pressurized systems up to 1500 psi.
• Exceptional Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability in harsh environments and reducing maintenance frequency.
• High Tensile Strength & Durability: Withstands 100,000 psi tensile stress and Rockwell B85 hardness for long-term reliability in demanding applications.
• Precision Thread Fit: Class 3A thread ensures tight, secure fastening with minimal backlash, enhancing assembly accuracy and vibration resistance.
• Wide Temperature Tolerance: O-ring maintains sealing integrity across a broad range from -40°F to 225°F, suitable for variable operational conditions.
• Easy Installation with Hex Drive: 3/8" hex socket allows for straightforward torque application, speeding up assembly and reducing tool slippage.
• Global Compliance & Interchangeability: Meets ASME B18.3, DIN 912, and ISO 4762 standards, ensuring compatibility and regulatory adherence worldwide.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address critical sealing challenges in industrial equipment, hydraulic systems, and high-pressure machinery. The 18-8 stainless steel construction provides inherent corrosion resistance, ideal for moist or chemically aggressive environments, while the Buna-N rubber O-ring delivers consistent sealing under fluctuating pressures and temperatures. Its UNC coarse thread and Class 3A fit enable quick, secure fastening with high clamp load retention, reducing the risk of loosening in vibrating assemblies. Commonly used in pump housings, valve covers, and compressor units, this fastener ensures leak-free performance, minimizes downtime, and supports efficient maintenance cycles in sectors like oil & gas, automotive, and industrial manufacturing.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 3A precision tolerance for accurate fit, and is fully threaded for uniform load distribution. It complies with ASME B18.3, DIN 912, and ISO 4762 mechanical standards, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.