S-90042A259 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 Buna-N rubber O-ring provides reliable sealing against fluids and gases, withstanding pressures up to 1500 psi for leak-free assemblies.
• Exceptional Corrosion Resistance – Made from 18-8 stainless steel, offering excellent durability in harsh environments and prolonged service life.
• High Tensile Strength – Rated at 100,000 psi, ensuring secure fastening under high-stress conditions without failure.
• Precision Thread Fit – Class 6g thread tolerance guarantees consistent, easy installation and optimal engagement in mating components.
• Wide Temperature Compatibility – O-ring functions effectively from -40° to 225° F, suitable for varied operational climates.
• Standardized Socket Drive – 3 mm hex drive allows for efficient torque application with common tools, reducing assembly time.
• Broad Regulatory Compliance – Meets ASME B18.3, DIN 912, and ISO 4762 standards, with RoHS 3 and REACH compliance for safe, global use.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to address critical sealing challenges in industrial and mechanical systems. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or outdoor elements. Combined with the Buna-N rubber O-ring, it effectively seals against high-pressure fluids (up to 1500 psi) and temperature fluctuations, preventing leaks in hydraulic systems, pneumatic equipment, and machinery enclosures. The fully threaded design and Class 6g thread fit ensure uniform load distribution and reliable fastening in metric assemblies, reducing the risk of loosening under vibration. Commonly used in automotive, aerospace, and manufacturing sectors, these screws offer a dependable solution for high-performance applications requiring both structural integrity and environmental sealing.

Specification Summary & Compliance

This product features a Class 6g thread fit with M4 x 0.7 mm coarse threads, ensuring precise dimensional accuracy per ISO standards. It complies with ASME B18.3, DIN 912, and ISO 4762 manufacturing specifications, guaranteeing interchangeability and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.