S-90042A458 M4 x 20 mm ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Viton® fluoroelastomer O-ring, providing reliable leak-proof connections in high-pressure and temperature-variable environments.
• Exceptional corrosion resistance from 18-8 stainless steel construction, ensuring long-term durability in harsh industrial conditions.
• High tensile strength of 100,000 psi delivers reliable fastening under heavy loads, reducing the risk of mechanical failure.
• Precise Class 6g thread fit ensures smooth installation and secure engagement, minimizing assembly time and improving joint integrity.
• Wide temperature tolerance from -20° to 400° F allows consistent performance in both extreme cold and high-heat applications.
• Compact hex socket drive (3 mm) enables easy installation in confined spaces with standard tools, enhancing assembly efficiency.
• Full threading along the 20 mm length provides maximum grip and adjustability, ideal for applications requiring precise clamping force.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to address critical sealing challenges in demanding industrial environments. The combination of 18-8 stainless steel and Viton® fluoroelastomer O-ring creates a robust sealing solution that maintains integrity under pressures up to 1500 psi and across a broad temperature range. The coarse thread pitch (0.7 mm) and Class 6g thread fit ensure quick, reliable installation while preventing cross-threading in high-vibration settings. These screws are particularly valuable in hydraulic systems, pneumatic equipment, and processing machinery where fluid containment and thermal stability are paramount. The fully threaded design and standard socket head profile further enhance their versatility for precision assembly in automotive, aerospace, and manufacturing applications where space constraints and reliability are critical concerns.

Specification Summary & Compliance

This metric socket head cap screw features M4 x 0.7 mm coarse threads with Class 6g tolerance for precise fitment. Manufacturing and dimensional compliance adhere to ASME B18.3, DIN 912, and ISO 4762 standards. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting international environmental and safety regulations for industrial components.