S-90323A445 M3 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 enabled by the 40mm shoulder with tight tolerances, reducing assembly errors and improving product quality.
• High mechanical strength offering 80,000 psi tensile strength and Rockwell B95 hardness for reliable performance under load.
• Secure and flush installation with low-profile hex socket head, allowing for compact designs and tamper-resistant fastening.
• Accurate and durable threading with Class 6g fit and coarse M3x0.5 pitch, ensuring consistent engagement and vibration resistance.
• Enhanced chemical stability from passivated finish, providing an extra layer of protection against oxidation and contaminants.
• Compliance with global standards including RoHS 3 and REACH, making it suitable for international markets and sensitive applications.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in moist or chemical-exposed settings, reducing maintenance costs and downtime. The 40mm shoulder length with minimal tolerances ensures exact positioning of moving parts in machinery, jigs, and assemblies, preventing misalignment and wear. The hex socket drive and low-profile head allow for secure, space-saving installations in compact designs, while the Class 6g thread fit and coarse pitch provide reliable fastening that withstands vibrations and dynamic loads. Ideal for use in automation, electronics, and precision equipment, this M3 shoulder bolt delivers long-term reliability and performance in demanding engineering environments.

Specification Summary & Compliance

This shoulder screw features a Metric M3x0.5 coarse thread with Class 6g tolerance for precise fit, a shoulder diameter of 4 mm with tolerance of -0.025 to 0 mm, and shoulder length of 40 mm with tolerance of 0 to 0.05 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial use.