S-90323A439 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish for long-lasting performance in harsh industrial environments.
• Exceptional strength and durability with 80,000 psi tensile strength and Rockwell B95 hardness to withstand high-stress applications.
• Precise alignment and secure assembly due to the exact 4mm shoulder length with tight tolerances, minimizing component misalignment.
• Reliable thread engagement with Class 6g metric coarse thread (M3 x 0.5mm) ensuring consistent fastening and vibration resistance.
• Easy installation in confined spaces using the low-profile hex socket head and 2mm drive, providing a secure grip with standard tools.
• Compliance with global environmental standards, being RoHS 3 and REACH compliant for safe and sustainable use in regulated industries.
• Optimized for right-hand thread applications with coarse thread spacing, enabling quick assembly and disassembly in dynamic settings.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision instruments. The 18-8 stainless steel construction, combined with a passivated finish, provides excellent resistance to corrosion and wear, extending service life in demanding conditions. The 4mm shoulder length with precise tolerances ensures accurate component positioning, reducing wear and misalignment in assemblies. Featuring a low-profile hex socket head, it allows for easy access in tight spaces, while the M3 x 0.5mm coarse thread and Class 6g fit deliver reliable fastening that withstands vibrations and dynamic loads. Ideal for applications requiring repeated adjustments, this screw enhances operational efficiency and reduces maintenance needs in sectors like robotics, electronics, and automotive manufacturing.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M3 thread size, 0.5mm pitch, and coarse thread spacing. It features a Class 6g thread fit for precise tolerance, a shoulder diameter of 4mm with a tolerance of -0.025 to 0 mm, and a shoulder length of 14mm with a tolerance of 0 to 0.05 mm, ensuring consistent performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.