S-98621A131 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Wear Resistance: TiCN coating provides superior surface hardness, extending service life in high-friction applications
• Corrosion-Resistant Construction: 18-8 stainless steel material ensures reliable performance in harsh industrial environments
• Precise Thread Engagement: Class 6g thread fit guarantees consistent, secure fastening with minimal tolerance variation
• High-Strength Performance: 70,000 psi tensile strength withstands demanding mechanical loads and vibration
• Optimized Drive Efficiency: 2.5mm hex socket drive enables high-torque installation without cam-out issues
• Accurate Shoulder Alignment: Precision-machined shoulder with tight diameter tolerance ensures proper component positioning
• Regulatory Compliance: Meets RoHS 3 and REACH environmental standards for global industrial applications

Professional Applications & Engineering Value

This precision shoulder screw delivers exceptional engineering value in demanding industrial applications where alignment accuracy and durability are critical. The 18-8 stainless steel construction combined with TiCN coating creates a superior surface that resists both corrosion and wear, making it ideal for machinery, automation systems, and precision instruments. The Class 6g thread fit and precisely machined shoulder ensure consistent component alignment while the coarse thread spacing facilitates quick assembly in production environments. The hex socket head design allows for high-torque installation in confined spaces, while the right-hand thread direction provides standardized fastening operations. These features collectively solve common industrial challenges including misalignment, thread stripping, and premature fastener failure in high-cycle applications.

Specification Summary & Compliance

This M4 shoulder screw features precise dimensional tolerances including Class 6g thread fit per metric standards, shoulder diameter tolerance of -0.025 to 0 mm, and shoulder length tolerance of 0 to 0.05 mm. The fastener maintains Rockwell B55 hardness and delivers 70,000 psi tensile strength for reliable mechanical performance. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental compliance for industrial applications worldwide. The combination of precise metric threading, controlled tolerances, and regulatory adherence makes this shoulder screw suitable for quality-critical assembly operations.