S-90042A234 M3 x 8 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 contaminants, withstanding pressures up to 1500 psi for leak-free operation in demanding environments.
• Exceptional Corrosion Resistance: Made from 18-8 stainless steel, offering excellent resistance to rust and corrosion, ensuring long-term durability in harsh industrial conditions.
• High Mechanical Strength: With a tensile strength of 100,000 psi and Rockwell B85 hardness, this screw maintains structural integrity under high stress and vibration.
• Precision Thread Fit: Class 6g thread ensures consistent, secure fastening with standard M3 nuts and tapped holes, reducing the risk of cross-threading and assembly errors.
• Wide Temperature Tolerance: O-ring functions effectively from -40° to 225° F, making it suitable for applications with extreme temperature fluctuations.
• Easy Installation with Standard Tools: 2.5 mm hex socket drive allows for quick, secure tightening using common Allen keys, minimizing installation time and tooling requirements.
• Full Thread Engagement: Fully threaded design provides maximum grip along the entire length, enhancing load distribution and pull-out resistance in thin materials.

Professional Applications & Engineering Value

This M3 socket head cap screw is engineered to address critical sealing and fastening challenges in industrial equipment, pneumatic systems, and fluid handling assemblies. The combination of 18-8 stainless steel and a Buna-N rubber O-ring ensures reliable performance where pressure integrity and corrosion resistance are paramount. The fully threaded metric screw with Class 6g thread fit guarantees precise alignment and secure mounting in tight-tolerance applications, reducing the risk of leaks and mechanical failures. Ideal for use in machinery, automotive components, and electronic enclosures, this sealing screw provides a robust solution that withstands vibration, thermal cycling, and exposure to oils or mild chemicals, thereby extending service life and minimizing maintenance downtime.

Specification Summary & Compliance

This product adheres to Class 6g thread tolerance per metric standards, ensuring dimensional accuracy for M3 x 0.5 mm coarse threads. It conforms to ASME B18.3, DIN 912, and ISO 4762 specifications for socket head cap screws, guaranteeing interchangeability and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for use in various industries.