S-90278A503 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise component alignment thanks to the 5mm shoulder diameter with tight tolerance (-0.025 to 0mm), ensuring accurate positioning and reduced assembly play.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness, providing reliable load-bearing capacity and resistance to deformation.
• Secure and efficient installation using a standard 2.5mm hex drive, allowing for high torque application and reduced risk of tool slippage.
• Durable, coarse M4 x 0.7mm thread with Class 6g fit, enabling quick assembly and strong holding power in various materials.
• Compliance with environmental regulations, being RoHS 3 and REACH compliant, ensuring safety and sustainability in your applications.
• Smooth socket head profile for a flush finish and reduced snagging in compact or moving assemblies.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, making it suitable for applications in machinery, automotive, and electronics where environmental factors are a concern. The 5mm shoulder diameter with precise tolerance ensures components like gears, pulleys, or linkages are accurately positioned, minimizing wear and vibration. The coarse thread (M4 x 0.7mm) and Class 6g thread fit provide robust engagement in metals or plastics, reducing the risk of stripping. Combined with a socket head hex drive, it allows for secure tightening in confined spaces, enhancing assembly efficiency and reliability in industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw adheres to metric standards with an M4 thread size, 0.7mm pitch, and Class 6g thread fit for consistent performance. The shoulder features precise dimensions: diameter tolerance of -0.025 to 0 mm and length tolerance of 0 to 0.05 mm, ensuring accurate fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global industrial use.