S-90278A553 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the smooth shoulder with tight diameter tolerance (-0.025 to 0 mm)
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing
• Secure, slip-resistant fastening using the 2 mm hex socket drive for easy installation and high torque application
• Accurate thread engagement with Class 6g fit and coarse M3 x 0.5 mm pitch for quick assembly and vibration resistance
• Consistent dimensional stability due to the 45 mm shoulder length held to +0.05 mm tolerance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, sustainable use

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, making it suitable for machinery, automotive, and electronics applications where environmental factors are a concern. The 45 mm shoulder length with minimal tolerance ensures exact positioning of components like gears, pulleys, and bearings, reducing wear and maintaining operational accuracy. Combined with the hex socket head and Class 6g thread fit, it offers reliable fastening that withstands vibrations and repeated use, enhancing the longevity and performance of industrial equipment.

Specification Summary & Compliance

This metric shoulder screw features a Class 6g thread fit with M3 x 0.5 mm coarse pitch and right-hand thread direction. The shoulder diameter is precisely controlled at 4 mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 45 mm with a +0.05 mm tolerance for consistent performance. Manufactured from 18-8 stainless steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard quality.