S-90042A270 M5 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 creates a reliable seal against fluids and gases, ideal for high-pressure applications up to 1500 psi.
• Exceptional Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability in harsh environments and prolonged service life.
• High Tensile Strength & Hardness: With 100,000 psi tensile strength and Rockwell B85 hardness, ensures secure, vibration-resistant fastening under heavy loads.
• Wide Temperature Tolerance: O-ring functions effectively from -40° to 225° F, maintaining seal integrity across diverse operating conditions.
• Precision Thread Fit: Class 6g thread ensures smooth installation and consistent performance, reducing assembly time and risk of cross-threading.
• Hex Socket Drive Compatibility: 4 mm hex drive allows for high torque application with standard tools, providing a flush, low-profile finish.
• Global Standard Compliance: Manufactured to DIN 912, ISO 4762, and ASME B18.3, guaranteeing interchangeability and reliability in international projects.

Professional Applications & Engineering Value

This M5 sealing socket head cap screw is engineered to address critical sealing and fastening challenges in demanding industrial environments. The combination of 18-8 stainless steel and a Buna-N rubber O-ring provides a robust solution for applications requiring leak-proof connections under high pressure, such as in hydraulic systems, pneumatic equipment, and fluid handling machinery. The fully threaded M5 x 0.8mm coarse thread design, with a Class 6g fit, ensures precise engagement and uniform clamping force, minimizing the risk of loosening due to vibration. Its socket head with a standard profile and 4 mm hex drive facilitates easy installation in confined spaces, making it a top choice for OEM assemblies, automotive components, and precision engineering projects where reliability and compliance with international standards are paramount.

Specification Summary & Compliance

This screw features an M5 x 0.8mm coarse thread with a Class 6g tolerance for dimensional accuracy, and is fully threaded for consistent holding power. It conforms to DIN 912, ISO 4762, and ASME B18.3 manufacturing specifications, ensuring high-quality performance. The product is also compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally conscious and safe industrial practices.