S-90323A613 M2 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh environments and extended service life.
• Precise component alignment ensured by the 18mm shoulder with tight tolerances, reducing assembly errors and improving product quality.
• High mechanical strength offering 85,000 psi tensile strength and Rockwell B90 hardness for reliable performance under high-stress conditions.
• Secure and flush installation with a low-profile socket head and 1.5mm hex drive, providing a sleek finish and preventing tampering.
• Accurate and durable threading with Class 6g fit and coarse 0.4mm pitch, enabling quick assembly and strong, vibration-resistant connections.
• Compliance with global regulations including RoHS 3 and REACH, ensuring safety and environmental standards for international supply chains.
• Optimized for automated assembly due to consistent right-hand metric threading and smooth head texture, increasing production efficiency.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to address critical challenges in precision assemblies, such as in robotics, electronics, and optical devices. The 18-8 stainless steel construction, combined with a passivated finish, provides exceptional resistance to corrosion and wear, reducing maintenance costs in humid or chemically aggressive settings. The 18mm precise shoulder acts as a reliable pivot or spacer, ensuring accurate alignment of components like gears and bearings, which minimizes part misalignment and enhances operational stability. With a low socket head and hex drive, it allows for compact designs and secure fastening in confined spaces, supporting high-volume manufacturing with consistent Class 6g thread fit. Ideal for industries requiring metric coarse thread reliability, this screw delivers long-term performance in demanding applications, from automotive sensors to medical equipment.

Specification Summary & Compliance

This precision shoulder screw adheres to metric system standards with an M2 x 0.4mm thread size and coarse spacing, ensuring compatibility with global components. The thread fit is Class 6g, providing tight tolerances for secure fastening, while the shoulder diameter (3 mm) and length (18 mm) maintain precise dimensional control per industrial norms. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for environmentally conscious procurement. Manufactured to high-quality benchmarks, it supports reliable performance in technical applications without compromising on safety or durability.