S-90278A331 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• Precise component alignment due to the 6mm shoulder with tight diameter and length tolerances, reducing assembly errors and improving product quality.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for dependable performance under load.
• Easy installation and removal with the 3mm hex socket drive, allowing secure tool engagement in confined spaces.
• Reliable thread engagement with Class 6g metric coarse thread (M5 x 0.8mm), ensuring consistent fastening and vibration resistance.
• Compliance with environmental regulations, being RoHS 3 and REACH compliant for safe use in global markets.
• Smooth head finish for reduced friction and damage to mating surfaces during tightening.

Professional Applications & Engineering Value

This M5 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 corrosion, making it ideal for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is common. The 6mm shoulder with precise fit acts as a pivot or spacer, ensuring accurate positioning of components like gears, bearings, or linkages, which minimizes wear and extends service life. Combined with the Class 6g thread and coarse pitch, it offers quick assembly and high vibration resistance, reducing maintenance needs. The hex socket drive allows for efficient torque application in tight spaces, streamlining production and repair processes in industrial settings.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M5 thread size and 0.8mm coarse pitch, featuring a Class 6g thread fit for consistent performance. The shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, ensuring high precision in manufacturing. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications.