S-95198A298 8-32 x 5/16" 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 sealing up to 1500 psi maximum pressure, preventing leaks in critical applications.
• Exceptional Corrosion Resistance: Made from 18-8 Stainless Steel, offering excellent durability and resistance to rust in harsh environments.
• High Tensile Strength & Reliability: With a 100,000 psi tensile strength, this screw provides robust, long-lasting fastening under high-stress conditions.
• Precise Thread Fit for Secure Fastening: Class 3A thread fit with 8-32 UNC coarse threads ensures tight, vibration-resistant connections and easy assembly.
• Wide Temperature Tolerance: O-ring functions effectively from -40° to 225° F, making it suitable for diverse thermal operating conditions.
• Standard Socket Head for Easy Installation: 9/64" hex drive and standard socket head profile allow for straightforward torque application with common tools.
• Full Thread Engagement: Fully threaded design maximizes grip and load distribution along the entire 5/16" length.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address common industrial challenges such as fluid leakage, vibration loosening, and corrosion. The 18-8 stainless steel construction provides inherent corrosion resistance, ideal for machinery, automotive, and marine applications exposed to moisture or chemicals. The Buna-N rubber O-ring and Class 3A thread fit work in tandem to create a dependable seal against high-pressure fluids and gases, reducing maintenance downtime. Its UNC coarse threads facilitate quick installation and disassembly, while the fully threaded rod ensures uniform stress distribution. Commonly used in hydraulic systems, pumps, and enclosures requiring up to 1500 psi pressure sealing, this fastener enhances operational safety and longevity in demanding environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards including Class 3A thread fit for tight tolerances and UNC coarse threads (8-32 size). It meets key international specifications: ASME B18.3, DIN 912, and ISO 4762. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures it is free from hazardous substances, supporting safe and environmentally responsible usage in global supply chains.