S-95198A378 3/8"-16 x 1 3/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated Buna-N O-ring ensures reliable fluid and gas sealing up to 1500 psi, preventing leaks in critical industrial systems.
• Exceptional Corrosion Resistance: Made from 18-8 Stainless Steel, offering excellent durability in harsh environments and resistance to rust and oxidation.
• High Tensile Strength & Durability: With a tensile strength of 100,000 psi and Rockwell B85 hardness, it withstands heavy loads and repetitive stress without failure.
• Precision Thread Fit for Secure Fastening: Class 3A thread fit provides tight tolerances and superior engagement, reducing the risk of loosening under vibration.
• Wide Temperature Compatibility: O-ring functions effectively from -40° to 225° F, making it suitable for applications with extreme temperature fluctuations.
• Easy Installation with Hex Drive: 5/16" hex drive allows for high torque application using standard tools, ensuring quick and secure assembly.
• Global Standard Compliance: Meets ASME B18.3, DIN 912, and ISO 4762 standards, ensuring interchangeability and reliability in international projects.

Professional Applications & Engineering Value

This Socket Head Cap Screw with a Buna-N O-ring seal is engineered to address common challenges in industrial sealing applications, such as fluid containment and pressure management. The 18-8 Stainless Steel construction provides robust resistance to corrosion, ideal for use in chemical processing, marine, or outdoor equipment where moisture and chemicals are present. The UNC coarse thread and Class 3A fit ensure quick assembly and reliable holding power, minimizing downtime in production lines. With a maximum pressure rating of 1500 psi and a broad temperature range, it excels in hydraulic systems, pneumatic controls, and machinery requiring leak-proof fastening. The fully threaded design allows for uniform stress distribution, enhancing joint integrity in high-vibration environments like automotive or aerospace assemblies.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC thread with Class 3A precision fit, ensuring dimensional accuracy per industry standards. It complies with ASME B18.3, DIN 912, and ISO 4762 specifications for consistent performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global use.