S-95198A121 2-56 x 3/4" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated silicone rubber O-rings that withstand pressures up to 1500 psi, preventing leaks in critical applications.
• Exceptional temperature resilience with an O-ring range from -80° to 400°F, ensuring reliable operation in extreme thermal environments.
• High-strength 18-8 stainless steel construction offering excellent corrosion resistance, Rockwell B85 hardness, and 100,000 psi tensile strength for long-lasting durability.
• Precise Class 3A thread fit with UNC coarse threads, providing secure, vibration-resistant fastening and easy assembly in industrial settings.
• Standard hex drive (5/64") design for straightforward installation using common tools, reducing assembly time and effort.
• Full compliance with major standards including ASME B18.3, DIN 912, and ISO 4762, ensuring interchangeability and quality assurance.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for safe use.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address common industrial challenges such as fluid leakage, thermal cycling, and mechanical stress in demanding environments. The 18-8 stainless steel material provides robust corrosion resistance, while the silicone rubber O-ring creates an effective seal against high-pressure fluids and gases, making it ideal for hydraulic systems, pneumatic equipment, and automotive assemblies. The Class 3A thread fit and UNC coarse threads ensure tight, reliable connections that resist loosening under vibration, reducing maintenance needs. With a 100,000 psi tensile strength, it supports heavy-duty applications in machinery, aerospace, and electronics, where precision and reliability are critical. The hex drive allows for easy torque application, streamlining installation in confined spaces.

Specification Summary & Compliance

This screw features a 2-56 UNC thread size with a Class 3A fit for precise dimensional accuracy and coarse threading. It adheres to ASME B18.3, DIN 912, and ISO 4762 standards, ensuring consistent quality and interchangeability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free from hazardous substances and suitable for global supply chains.