S-98451A117 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 brass construction, ideal for harsh industrial environments and electrical applications
• Precise component alignment with 5mm shoulder diameter and tight tolerance fit, reducing assembly errors and improving product quality
• High mechanical strength with Rockwell B55 hardness and 40,000 psi tensile strength for reliable performance under load
• Secure installation and removal with 2.5mm hex socket drive, preventing stripping and enabling high-torque applications
• Consistent thread engagement with Class 6g metric thread fit, ensuring vibration resistance and long-term fastening integrity
• Environmental compliance with RoHS 3 and REACH regulations, meeting international standards for hazardous substance restrictions
• Optimized for automated assembly with smooth head texture and standard socket profile for efficient high-volume production

Professional Applications & Engineering Value

This M4 shoulder screw delivers exceptional engineering value in precision mechanical assemblies where alignment accuracy and corrosion resistance are critical. The 360 brass material provides excellent electrical conductivity and natural lubricity, making it ideal for electronic enclosures, instrumentation, and marine applications. The precise shoulder diameter (5mm with tight tolerances) acts as a built-in spacer, eliminating the need for additional components and reducing assembly time in automated manufacturing. With its hex socket drive and Class 6g thread fit, this shoulder bolt maintains consistent clamping force in high-vibration environments while resisting galvanic corrosion when paired with dissimilar metals. The combination of Rockwell B55 hardness and 40,000 psi tensile strength ensures reliable performance in industrial equipment, optical devices, and precision machinery where dimensional stability is paramount.

Specification Summary & Compliance

This metric shoulder screw features M4 x 0.7mm coarse right-hand threads with Class 6g thread fit per ISO standards, ensuring precise engagement. The shoulder maintains a diameter of 5mm with tolerance of -0.025 to 0mm and length of 5mm with tolerance of 0 to 0.05mm for precision alignment. Manufacturing complies with RoHS 3 (2015/863/EU) with exemption 6(c) for lead in copper alloy and REACH (EC 1907/2006) compliance, meeting international environmental regulations for industrial components.