S-90278A501 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Precise alignment and positioning enabled by the 2mm shoulder with tight tolerances for reduced assembly errors.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
• Secure and tamper-resistant fastening with hex socket drive, allowing high torque application without stripping.
• Consistent thread engagement due to Class 6g thread fit, providing reliable clamping force.
• Rockwell B55 hardness offers excellent wear resistance and durability for repeated use.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance in global markets.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for machinery, automotive, and electronics assembly where exposure to moisture or chemicals is common. The precise shoulder fit with a diameter of 5mm and length of 2mm ensures accurate component positioning, reducing misalignment and wear in moving parts. Combined with a hex socket drive and coarse thread spacing, it allows for quick, secure installation in high-vibration environments, enhancing operational reliability and minimizing maintenance downtime.

Specification Summary & Compliance

This metric shoulder screw features an M4 x 0.7mm thread with Class 6g tolerance for precise fit. The shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, ensuring high dimensional accuracy. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing compliance with environmental and safety standards for industrial use.