S-98621A111 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance - 18-8 stainless steel construction with TiCN coating provides superior wear resistance and long-term reliability in harsh industrial environments.
• Precise Shoulder Alignment - 4mm shoulder length with tight tolerances ensures accurate component positioning and reduces assembly misalignment.
• High Strength Performance - Rockwell B55 hardness and 70,000 psi tensile strength deliver reliable fastening under mechanical stress and vibration.
• Secure Hex Drive Engagement - 2mm hex socket drive prevents cam-out and allows for high-torque installation with standard tools.
• Optimized Thread Fit - Class 6g thread tolerance with M3x0.5 coarse pitch ensures consistent engagement and reduces cross-threading risks.
• Regulatory Compliance Assurance - Meets RoHS 3 and REACH standards for safe use in regulated industries and global markets.
• Smooth Head Profile - Standard socket head with smooth texture facilitates clean installation and prevents surface damage.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and wear challenges in industrial machinery. The 18-8 stainless steel base material combined with TiCN coating provides exceptional resistance to abrasion and chemical exposure, making it ideal for rotating assemblies, pivoting mechanisms, and precision instruments. The 4mm shoulder length with precise diameter control acts as a reliable locating dowel, eliminating play in bearings, gears, and linkages. With its Class 6g thread fit and coarse metric thread pattern, it ensures rapid assembly while maintaining vibration resistance in automated equipment, CNC systems, and electronic enclosures where dimensional stability is paramount.

Specification Summary & Compliance

This M3x0.5 shoulder screw features Class 6g thread tolerance with 4mm shoulder diameter (-0.025 to 0 mm tolerance) and 4mm shoulder length (0 to 0.05 mm tolerance). Manufactured to metric standards with right-hand coarse threads, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability for industrial applications.