S-90278A433 M2 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh environments and ensuring long-term reliability.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, providing dependable performance under load.
• Precise alignment and pivot function due to the accurately machined 3mm shoulder with tight diameter and length tolerances.
• Secure and flush installation enabled by the smooth socket head and standard hex drive, minimizing protrusion and offering a clean finish.
• Reliable thread engagement with a Class 6g fit and coarse M2 x 0.4mm thread, ensuring easy assembly and vibration resistance.
• Broad regulatory compliance with RoHS 3 and REACH, making it suitable for global markets and sensitive applications.
• Versatile metric design for seamless integration into a wide range of industrial machinery and precision equipment.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to address critical alignment and rotational challenges in precision assemblies. The 18-8 Stainless Steel material offers excellent resistance to rust and corrosion, which is vital for components exposed to moisture or chemicals. The precise shoulder fit with its controlled diameter and length tolerances ensures components like gears, pulleys, and linkages are perfectly aligned, reducing wear and preventing misalignment failures. The coarse thread pitch and Class 6g thread fit provide robust holding power and are less prone to cross-threading, speeding up assembly in automated or high-volume production lines. Its socket head with hex drive allows for compact installation in confined spaces, making it a top choice for electronics, medical devices, and small machinery where space and reliability are paramount.

Specification Summary & Compliance

This metric shoulder screw features an M2 x 0.4mm coarse thread with a Class 6g thread fit per ISO standards, ensuring dimensional accuracy and interchangeability. The shoulder is manufactured to precise tolerances: diameter of 3mm (-0.025 to 0 mm) and length of 4mm (0 to 0.05 mm). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for use in regulated industries and international supply chains.