S-90278A552 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment through a 40mm shoulder with tight length tolerance (0 to 0.05mm) for stable assemblies
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing
• Secure hex socket drive with 2mm hex key for high torque application and reduced risk of stripping
• Consistent thread engagement with Class 6g thread fit and M3x0.5 coarse thread for quick, reliable fastening
• Smooth head surface minimizes friction and prevents damage to mating surfaces during installation
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and stability challenges in mechanical assemblies. The 40mm shoulder length with minimal tolerance provides exact positioning for rotating parts like gears and pulleys, eliminating the need for additional spacers. Manufactured from 18-8 stainless steel, it delivers excellent corrosion resistance in humid or chemically exposed environments, while the hex socket drive allows for high-torque installation in confined spaces. The M3x0.5 coarse thread ensures rapid assembly and disassembly, making it ideal for production lines and maintenance applications. Its right-hand thread direction and Class 6g thread fit guarantee consistent performance in automated equipment, robotics, and precision instruments where vibration resistance and repeatability are paramount.

Specification Summary & Compliance

This M3 shoulder screw features a 4mm thread length with Class 6g thread fit per metric standards, ensuring precise thread engagement. The shoulder diameter maintains a tight tolerance of -0.025 to 0 mm for accurate fit. Manufacturing adheres to strict dimensional controls, with shoulder length tolerance of 0 to 0.05 mm. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial and electronic applications without hazardous substances.