S-90042A221 M2.5 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 provides a reliable seal against fluids and gases, ideal for pressurized systems up to 1500 psi.
• Exceptional Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability in harsh environments and resistance to rust and oxidation.
• High Tensile Strength & Durability: With a tensile strength of 100,000 psi and Rockwell B85 hardness, these screws withstand high stress and repetitive use without failure.
• Precise Thread Fit for Secure Fastening: Class 6g thread ensures consistent, accurate engagement, reducing the risk of loosening in vibration-prone applications.
• Wide Temperature Tolerance: O-ring material functions effectively from -40° to 225° F, making it suitable for extreme thermal conditions in industrial settings.
• Easy Installation with Hex Drive: Standard 2 mm hex socket drive allows for quick, secure tightening with common tools, minimizing assembly time.
• Broad Compatibility & Standardization: Fully threaded M2.5 x 0.45 mm coarse pitch design adheres to major standards, ensuring interchangeability and reliability.

Professional Applications & Engineering Value

This M2.5 metric socket head cap screw is engineered to address critical sealing challenges in demanding industrial environments. The combination of 18-8 stainless steel and a Buna-N rubber O-ring provides a robust solution for applications where leakage prevention is paramount, such as in hydraulic systems, pneumatic equipment, and fluid handling assemblies. The fully threaded design with a Class 6g thread fit ensures precise alignment and uniform load distribution, reducing the risk of thread stripping under high pressure. Its hex drive facilitates easy installation in confined spaces, while the high tensile strength and corrosion-resistant properties make it ideal for machinery, automotive, and electronics sectors requiring long-term reliability and compliance with international standards.

Specification Summary & Compliance

This screw features an M2.5 thread size with a 0.45 mm coarse pitch and Class 6g thread fit, ensuring dimensional accuracy and ease of assembly. It is manufactured in compliance with ASME B18.3, DIN 912, and ISO 4762 standards, guaranteeing consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial applications without hazardous substances.