S-90278A738 M3.5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Enhanced assembly precision due to the precisely machined 10mm shoulder with tight length tolerance, ensuring accurate component alignment.
• High-strength performance with a tensile strength of 70,000 psi and Rockwell B55 hardness, providing reliable load-bearing capacity.
• Secure, tamper-resistant fastening enabled by the 2.5mm hex socket drive, allowing for high-torque installation in confined spaces.
• Consistent and reliable thread engagement with a Class 6g thread fit and M3.5x0.6mm coarse pitch for quick assembly and vibration resistance.
• Minimal play and wobble from the shoulder diameter's tight tolerance, crucial for high-precision mechanical applications.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.

Professional Applications & Engineering Value

This M3.5 shoulder screw is engineered to address critical challenges in precision assembly and high-load mechanical systems. The 18-8 stainless steel material offers excellent resistance to oxidation and corrosion, making it suitable for automotive, electronics, and industrial machinery exposed to demanding conditions. The 10mm shoulder length with precise tolerances acts as a reliable pivot or spacer, eliminating misalignment and reducing wear on moving parts. Combined with the Class 6g thread fit and coarse pitch, it ensures rapid, secure fastening even in high-vibration environments. The hex socket drive allows for efficient installation with standard tools, streamlining production and maintenance workflows while maintaining a clean, professional finish.

Specification Summary & Compliance

This precision shoulder screw adheres to metric system standards with an M3.5 thread size, 0.6mm coarse pitch, and a thread length of 5mm. The shoulder features a diameter of 5mm with a tolerance of -0.025 to 0 mm and a length of 10mm with a tolerance of 0 to 0.05 mm, ensuring exacting dimensional accuracy. The Class 6g thread fit provides consistent performance in line with ISO metric specifications. It is manufactured to be fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material transparency for global supply chains.