S-90042A227 M2.5 x 20 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, ideal for pressurized systems up to 1500 psi.
• Exceptional Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability in harsh environments and reducing maintenance needs.
• High Tensile Strength & Hardness: With 100,000 psi tensile strength and Rockwell B85 hardness, ensures reliable, long-lasting fastening under high stress.
• Wide Temperature Tolerance: O-ring functions effectively from -40° to 225°F, maintaining seal integrity across diverse operating conditions.
• Precision Thread Fit: Class 6g coarse threads provide easy assembly and secure engagement, minimizing the risk of cross-threading.
• Compact, Low-Profile Design: Socket head with 2 mm hex drive allows for installation in tight spaces and offers high torque transmission.
• Global Compliance & Reliability: Meets ASME B18.3, DIN 912, and ISO 4762 standards, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This M2.5 socket head cap screw is engineered for demanding applications where sealing and reliability are critical. The 18-8 stainless steel construction resists corrosion, while the Buna-N rubber O-ring effectively seals against high pressure (up to 1500 psi) and extreme temperatures (-40° to 225°F), preventing leaks in hydraulic systems, pneumatic equipment, and fluid handling assemblies. Its fully threaded design and Class 6g thread fit ensure uniform clamping force and vibration resistance, making it a trusted choice for machinery, automotive, and industrial enclosures. The hex socket drive allows for secure installation with standard tools, reducing assembly time and improving operational efficiency in compact designs.

Specification Summary & Compliance

This metric screw features an M2.5 x 0.45 mm coarse thread with a Class 6g tolerance for precise fit. It is manufactured in compliance with ASME B18.3, DIN 912, and ISO 4762 specifications, ensuring dimensional accuracy and performance consistency. The product is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmentally responsible sourcing and use in global markets.