S-90323A324 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments.
• Exceptional strength and durability with a Rockwell B95 hardness and 80,000 psi tensile strength, preventing failure under high stress.
• Precise component alignment enabled by the accurately machined 5mm diameter shoulder with tight tolerances, reducing assembly errors.
• Reliable and secure fastening from the Class 6g thread fit and coarse 0.7mm pitch, providing excellent grip and vibration resistance.
• Easy installation in confined spaces with the low-profile socket head and 2.5mm hex drive, allowing for efficient tool access.
• Enhanced surface protection via the passivated finish, which increases resistance to corrosion and wear.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in various industries.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining exact alignment and resisting loosening under dynamic loads. The 18-8 Stainless Steel material offers excellent corrosion resistance, making it ideal for applications in moist or chemically aggressive settings, including machinery, automotive components, and electronic enclosures. Its Class 6g thread fit and coarse 0.7mm pitch ensure a secure, vibration-resistant connection, while the precisely toleranced shoulder (5mm diameter, 8mm length) allows for accurate positioning of moving parts like gears or bearings. The low-profile socket head with hex drive facilitates quick installation in tight spaces, reducing assembly time and improving overall efficiency in automated or manual production lines.

Specification Summary & Compliance

This shoulder screw features a Metric M4 x 0.7mm coarse pitch thread with a Class 6g thread fit for precise engagement. The shoulder diameter is 5 mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 8 mm with a tolerance of 0 to 0.05 mm, ensuring high dimensional accuracy. It is manufactured from 18-8 Stainless Steel with a passivated finish and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for environmentally conscious and industrial applications.