S-90323A322 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and a passivated finish, ensuring long-term reliability in harsh environments.
• Precise component alignment and spacing is guaranteed by the accurately machined 5mm shoulder with a precise fit, reducing assembly errors.
• High-strength performance with a tensile strength of 80,000 psi and Rockwell B95 hardness, providing dependable load-bearing capacity.
• Secure, low-profile fastening enabled by the smooth, low socket head and 2.5mm hex drive, ideal for applications with limited clearance.
• Consistent and reliable threading due to the Class 6g thread fit and coarse M4 x 0.7mm pitch, ensuring easy installation and vibration resistance.
• Compliance with strict environmental standards, including RoHS 3 and REACH, making it suitable for regulated industries.
• Right-hand thread design for standard installation, facilitating efficient assembly in common industrial applications.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining exact part alignment and resisting operational stresses. The 18-8 stainless steel material, combined with a passivated finish, offers excellent resistance to corrosion and wear, which is vital in industries like automation, electronics, and machinery where exposure to moisture or chemicals is common. The 5mm shoulder length and precise diameter tolerances ensure that components are held securely at the correct distance, minimizing misalignment and reducing the need for additional spacers. With its hex socket drive and low-profile head, it allows for compact designs and easy installation in confined spaces, enhancing assembly efficiency and product longevity in demanding engineering applications.

Specification Summary & Compliance

This shoulder screw adheres to metric standards with an M4 thread size, 0.7mm coarse pitch, and Class 6g thread fit for consistent performance. The shoulder features precise tolerances: diameter of 5mm (-0.025 to 0 mm) and length of 5mm (0 to 0.05 mm). It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global markets.