S-90042A289 M8 x 25 mm ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Reliable high-pressure sealing up to 1500 psi, thanks to the integrated Buna-N O-ring that prevents leaks in critical applications.
• Wide temperature tolerance from -40° to 225° F, ensuring consistent performance and seal integrity under varying thermal conditions.
• High tensile strength of 100,000 psi and Rockwell B85 hardness for dependable load-bearing and resistance to stripping or shearing.
• Precise Class 6g thread fit and coarse M8 x 1.25mm thread for easy assembly, secure fastening, and vibration resistance.
• Standard hex socket drive (6mm) allows for high torque application and access in confined spaces, reducing installation time.
• Full threading along the 25mm length provides uniform clamping force and flexibility in material thickness adjustments.

Professional Applications & Engineering Value

This M8 socket head cap screw is engineered to address common industrial challenges such as fluid leakage and joint failure in high-stress assemblies. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for outdoor, marine, and chemical processing equipment. Combined with the Buna-N rubber O-ring, it creates a robust seal that withstands pressures up to 1500 psi, ideal for hydraulic systems, pneumatic components, and machinery requiring sealing screw solutions. The coarse metric thread and Class 6g thread fit ensure quick, reliable installation with reduced risk of cross-threading, while the fully threaded design enhances grip in diverse materials. These features make it a top choice for OEMs and maintenance teams in automotive, aerospace, and industrial manufacturing, where durability and leak-proof performance are critical.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards with a Class 6g thread fit per metric specifications, ensuring compatibility and interchangeability. It meets ASME B18.3, DIN 912, and ISO 4762 manufacturing norms for socket head cap screws, guaranteeing consistent quality and performance. Additionally, the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.