S-90042A238 M3 x 18 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 contaminants, ideal for pressurized applications.
• High Tensile Strength & Durability: 100,000 psi tensile strength and Rockwell B85 hardness ensure long-term reliability under demanding mechanical loads.
• Excellent Corrosion Resistance: Made from 18-8 stainless steel for reliable performance in harsh or corrosive environments.
• Wide Temperature Tolerance: O-ring functions effectively across a broad range from -40° to 225° F, maintaining seal integrity.
• Precision Thread Fit: Class 6g thread ensures consistent, secure fastening with minimal risk of cross-threading or loosening.
• High-Pressure Capability: Withstands pressures up to 1500 psi, making it suitable for hydraulic and pneumatic systems.
• Standardized Socket Drive: Hex socket drive (2.5 mm) allows for easy installation and removal with standard tools, reducing assembly time.

Professional Applications & Engineering Value

This M3 socket head cap screw is engineered to address critical sealing challenges in industrial applications. The combination of 18-8 stainless steel construction and a Buna-N rubber O-ring provides a durable, corrosion-resistant solution that prevents leaks in high-pressure environments up to 1500 psi. Its fully threaded design and Class 6g thread fit ensure precise engagement and vibration resistance, reducing maintenance needs in machinery, fluid systems, and automated equipment. Ideal for use in hydraulic assemblies, pneumatic controls, and enclosures requiring environmental sealing, this fastener delivers consistent performance across a wide temperature range from -40° to 225° F, supporting operational reliability in diverse conditions.

Specification Summary & Compliance

This metric screw features M3 x 0.5 mm coarse threading with a Class 6g thread fit for precise dimensional accuracy. It complies with key international standards including ASME B18.3, DIN 912, and ISO 4762, ensuring interchangeability and quality. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.