S-90042A257 M4 x 16 mm 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 leak-proof sealing in demanding applications, protecting against fluid and gas ingress.
• Exceptional Corrosion Resistance: Made from 18-8 Stainless Steel, offering excellent durability and resistance to rust and oxidation in harsh environments.
• High Tensile Strength & Durability: With a tensile strength of 100,000 psi and Rockwell B85 hardness, this screw provides robust, long-lasting fastening under high stress.
• Wide Temperature Tolerance: O-ring maintains sealing integrity across a broad temperature range from -40° to 225° F, suitable for varied operational conditions.
• Precision Thread Fit: Class 6g thread fit ensures smooth, accurate installation and secure holding power, reducing the risk of cross-threading.
• High-Pressure Capability: Designed to withstand pressures up to 1500 psi, ideal for hydraulic and pneumatic systems requiring secure, sealed connections.
• Easy Installation with Hex Socket Drive: Standard hex socket head and 3 mm drive size allow for straightforward, high-torque assembly using common tools, minimizing installation time.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to address critical challenges in industrial assemblies where sealing reliability and structural integrity are paramount. The combination of 18-8 stainless steel and a Buna-N rubber O-ring provides a robust solution for preventing leaks in high-pressure environments, such as hydraulic systems, pneumatic equipment, and fluid handling machinery. Its fully threaded design and coarse thread pitch ensure quick, secure fastening even in vibrating conditions, reducing maintenance needs. By meeting DIN 912 and ISO 4762 standards, it guarantees dimensional accuracy and interchangeability, making it a trusted choice for OEMs and maintenance teams seeking to enhance assembly efficiency and longevity in automotive, aerospace, and manufacturing sectors.

Specification Summary & Compliance

This socket head cap screw features precise metric dimensions: M4 x 0.7mm thread with a Class 6g tolerance for accurate fit, 16mm length, and a standard hex socket drive. It complies with ASME B18.3, DIN 912, and ISO 4762 manufacturing specifications, ensuring consistent quality and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe usage in global markets.