S-90042A459 M4 x 25 mm ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated Viton® fluoroelastomer O-ring ensures reliable leak-proof sealing in high-pressure environments up to 1500 psi, preventing fluid and gas ingress.
• Exceptional Corrosion & Temperature Resistance: Made from 18-8 Stainless Steel, this screw withstands harsh conditions and temperatures from -20° to 400° F, ideal for demanding industrial settings.
• High Tensile Strength & Durability: With a tensile strength of 100,000 psi and Rockwell B85 hardness, it offers robust, long-lasting fastening under heavy loads.
• Precision Thread Fit for Secure Assembly: Class 6g thread fit provides consistent, reliable engagement, reducing the risk of loosening in vibration-prone applications.
• Easy Installation with Standard Hex Drive: The 3 mm hex socket drive allows for quick, tool-friendly installation and high torque application without slippage.
• Broad Industry Compliance: Meets ASME B18.3, DIN 912, and ISO 4762 standards, ensuring compatibility and reliability in global engineering projects.
• Environmental & Safety Compliance: Fully compliant with RoHS 3 and REACH regulations, making it safe for use in regulated industries without harmful substances.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to address critical challenges in industrial applications where sealing reliability and corrosion resistance are paramount. The combination of 18-8 stainless steel and a Viton® fluoroelastomer O-ring provides an effective solution for preventing leaks in high-pressure systems, such as hydraulic assemblies, pneumatic equipment, and fluid handling machinery. Its fully threaded metric design with a coarse thread pitch ensures quick installation and secure holding power, while the class 6g thread fit maintains precision in dynamic environments. Ideal for use in automotive, aerospace, and manufacturing sectors, this screw minimizes downtime by offering durable performance in extreme temperatures and corrosive conditions, enhancing overall equipment longevity and safety.

Specification Summary & Compliance

This product features precise metric thread specifications with an M4 x 0.7 mm coarse thread and class 6g thread fit, ensuring accurate dimensional tolerance per ISO standards. It complies with ASME B18.3, DIN 912, and ISO 4762 manufacturing norms, and meets regulatory requirements including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) for environmental safety and restricted substance control.