S-90270A657 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Precise component alignment ensured by the 5mm shoulder with controlled diameter and length tolerances for stable assemblies.
• Reliable thread engagement with Class 6g fit and coarse M4 x 0.7mm thread, facilitating quick installation and vibration resistance.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding load applications.
• Secure drive performance via the socket head design, allowing high torque application and reduced risk of stripping.
• Environmental compliance with RoHS 3 and REACH standards, ensuring safety in regulated industries.
• Versatile industrial use due to metric sizing and smooth head texture, suitable for machinery, fixtures, and precision equipment.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, such as food processing, marine, and outdoor machinery. The precise shoulder diameter and length with tight tolerances ensure accurate positioning of moving parts, reducing wear and misalignment in assemblies like bearings, pulleys, and linkages. The Class 6g thread fit and coarse thread pitch enable robust fastening that withstands vibrations and dynamic loads, common in automotive and automation equipment. Combined with a socket head drive, it allows for efficient installation in confined spaces, enhancing productivity and reducing maintenance downtime.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M4 x 0.7mm coarse thread and Class 6g thread fit for consistent performance. Shoulder dimensions include a diameter of 5 mm (tolerance: -0.025 to 0 mm) and length of 5 mm (tolerance: 0 to 0.05 mm), ensuring precise fit. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free of hazardous substances for safe use in various industrial and consumer applications.