S-90042A219 M2.5 x 4 mm ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring, preventing leaks in high-pressure applications up to 1500 psi.
• Excellent corrosion resistance provided by 18-8 stainless steel construction, ensuring longevity in harsh industrial environments.
• High tensile strength of 100,000 psi and Rockwell B85 hardness for reliable load-bearing and resistance to deformation.
• Precise Class 6g thread fit guarantees smooth installation and secure fastening in metric coarse thread applications.
• Wide temperature tolerance from -40° to 225° F allows consistent performance in extreme thermal conditions.
• Hex socket drive design enables easy installation with standard 2 mm hex keys, reducing assembly time and tool slippage.
• Full compliance with international standards including ASME B18.3, DIN 912, and ISO 4762, ensuring interchangeability and quality assurance.

Professional Applications & Engineering Value

This M2.5 socket head cap screw is engineered to address critical sealing challenges in demanding industrial settings. The combination of 18-8 stainless steel and a Buna-N rubber O-ring creates a robust barrier against fluid and gas leakage, making it ideal for hydraulic systems, pneumatic equipment, and precision machinery where pressure integrity is paramount. The metric coarse thread with Class 6g tolerance ensures quick, secure fastening without cross-threading, while the hex socket drive allows for high torque application in confined spaces. Its compact 4 mm length and 2.5 mm thread size make it suitable for small-scale assemblies in electronics, automotive components, and medical devices, providing reliable sealing performance under maximum pressure of 1500 psi.

Specification Summary & Compliance

This screw features a M2.5 x 0.45 mm metric coarse thread with Class 6g thread fit per ISO standards, ensuring dimensional accuracy and compatibility. It is manufactured in compliance with ASME B18.3, DIN 912, and ISO 4762 specifications for socket head cap screws. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental regulations for hazardous substance restrictions.