S-90270A659 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 alignment and pivot function enabled by the 8mm shoulder with tight diameter tolerance, reducing wear in assemblies.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load.
• Accurate and secure fastening thanks to Class 6g thread fit and M4 x 0.7mm coarse thread for quick assembly and vibration resistance.
• Easy installation and removal with socket head design, allowing high torque application in confined spaces.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in global markets.
• Consistent dimensional stability with precise shoulder length and diameter tolerances for repeatable engineering applications.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address common challenges in precision machinery, such as misalignment and component wear. The 18-8 stainless steel material offers excellent resistance to rust and oxidation, making it suitable for automotive, electronics, and food processing equipment where cleanliness and durability are critical. The 8mm shoulder diameter provides a stable bearing surface, allowing parts to rotate or pivot smoothly without loosening. With a Class 6g thread fit and coarse thread pitch, it ensures rapid assembly and reliable holding power in high-vibration environments. The socket head design facilitates secure driving with standard tools, reducing installation time and improving maintenance efficiency in industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to Metric system standards with an M4 thread size, 0.7mm pitch, and Class 6g thread fit for precise tolerance. The shoulder features a diameter of 8mm (tolerance: -0.025 to 0 mm) and length of 8mm (tolerance: 0 to 0.05 mm) to ensure accurate positioning. It is manufactured from 18-8 stainless steel with a hardness of Rockwell B55 and tensile strength of 70,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity.