S-90278A312 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for extended service life in harsh environments
• Precise component alignment through controlled shoulder diameter (4mm) and length (5mm) with tight tolerances
• High mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure hex socket drive with 2mm hex key compatibility providing reliable torque transmission and reduced stripping risk
• Optimized thread engagement with Class 6g thread fit ensuring consistent fastening performance in metric assemblies
• Regulatory compliance meeting RoHS 3 and REACH environmental standards for global industrial use
• Quick installation with coarse M3x0.5 thread pitch enabling faster assembly in production environments

Professional Applications & Engineering Value

This precision shoulder screw addresses critical alignment challenges in industrial machinery and precision equipment. The 18-8 stainless steel construction provides exceptional corrosion resistance, eliminating premature failure in humid or chemical environments. The precisely machined shoulder with controlled diameter and length tolerances ensures accurate component positioning in rotating assemblies, jigs, and fixtures. The hex socket head with 2mm drive accommodates confined spaces while maintaining high torque capability. With Class 6g thread fit and coarse M3x0.5 threading, these screws deliver reliable fastening in automation equipment, electronic enclosures, and precision mechanisms where vibration resistance and dimensional stability are paramount.

Specification Summary & Compliance

Manufactured to metric standards with Class 6g thread tolerance and precise shoulder dimensions (4mm diameter with -0.025 to 0 mm tolerance, 5mm length with 0 to 0.05 mm tolerance). The M3x0.5 coarse thread configuration ensures compatibility with standard metric components. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and regulatory acceptance for industrial applications worldwide.