S-90042A185 M5 x 40 mm ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance – Integrated silicone rubber O-ring provides reliable leak-proof sealing up to 1500 psi, ideal for hydraulic and pneumatic systems.
• Exceptional Corrosion Resistance – Made from 18-8 stainless steel, offering excellent durability in harsh environments and moisture-prone applications.
• High Tensile Strength & Hardness – With 100,000 psi tensile strength and Rockwell B85 hardness, ensuring long-term reliability under heavy loads and vibration.
• Wide Temperature Tolerance – O-ring functions effectively from -80° to 400° F, maintaining seal integrity in extreme thermal conditions.
• Precision Thread Fit – Class 6g thread tolerance ensures smooth installation and secure fastening in metric assemblies.
• Space-Saving Socket Head Design – Hex socket drive (4 mm) allows for compact installation in confined spaces with standard tools.
• Industry Standard Compliance – Meets DIN 912, ISO 4762, and ASME B18.3 specifications for consistent quality and interchangeability.

Professional Applications & Engineering Value

This M5 sealing socket head cap screw is engineered to address critical challenges in high-pressure fluid systems, pneumatic equipment, and industrial machinery where leakage can lead to operational failures. The 18-8 stainless steel construction provides inherent resistance to rust and chemical exposure, while the silicone rubber O-ring creates a dependable seal that withstands pressure fluctuations and temperature extremes. Its partially threaded design and Class 6g thread fit ensure precise engagement in tapped holes, reducing the risk of cross-threading and improving assembly efficiency. By integrating sealing directly into the fastener, it eliminates the need for additional gaskets, simplifying design and lowering maintenance costs in applications like pumps, valves, and compressors.

Specification Summary & Compliance

This screw features an M5 x 0.8 mm coarse metric thread with Class 6g tolerance for precise fit, a partially threaded shank with 24 mm minimum thread length, and overall length of 40 mm. It conforms to ASME B18.3, DIN 912, and ISO 4762 dimensional standards, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.