S-90278A425 M8 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 30mm shoulder with tight diameter and length tolerances
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing
• Secure installation and removal using the 5mm hex socket drive, preventing tool slippage
• Accurate thread engagement with Class 6g metric coarse threads (M8x1.25mm) for consistent fastening
• Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Durable performance in repetitive assembly applications due to the smooth socket head and right-hand thread design

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, making it suitable for automotive, packaging, and electronic assembly lines. The 30mm shoulder length with precise fit tolerance allows for accurate positioning of moving parts like gears and pulleys, reducing wear and vibration. Combined with the Class 6g thread fit and coarse pitch, it ensures quick assembly and high clamping force in high-vibration environments. The 5mm hex drive offers reliable torque transmission, minimizing the risk of damage during maintenance.

Specification Summary & Compliance

This metric shoulder screw features an M8x1.25mm coarse thread with Class 6g thread fit, a shoulder diameter of 10 mm (tolerance: -0.025 to 0 mm), and shoulder length of 30 mm (tolerance: 0 to 0.05 mm). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Manufactured to precise dimensional standards for consistent performance in industrial applications.