S-90323A453 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh industrial environments.
• Precise component alignment thanks to the precisely machined 18mm shoulder with tight diameter tolerance, reducing assembly errors and improving product quality.
• High-strength performance with 80,000 psi tensile strength and Rockwell B95 hardness, providing reliable load-bearing capacity for demanding applications.
• Space-saving low-profile socket head with 2.5mm hex drive, allowing for easy installation in confined spaces while maintaining a sleek appearance.
• Consistent thread engagement with Class 6g thread fit and coarse M4 x 0.7mm pitch, ensuring secure fastening and vibration resistance.
• Environmental compliance assurance by meeting RoHS 3 and REACH regulations, making it suitable for global markets and eco-conscious industries.
• Optimized for automated assembly with smooth head texture and right-hand thread direction, enabling efficient high-volume production processes.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and wear, making it ideal for machinery, automotive, and electronics applications where exposure to moisture or chemicals is common. The 18mm shoulder length with precise diameter control acts as a reliable pivot or spacer, eliminating the need for additional components and reducing assembly time. The low-profile socket head with hex drive ensures secure torque transmission without protruding, protecting adjacent parts in compact designs. By integrating high tensile strength and standardized metric thread specifications, this shoulder screw delivers consistent performance in automated manufacturing and maintenance operations, minimizing downtime and enhancing operational efficiency.

Specification Summary & Compliance

This precision shoulder screw features a Class 6g thread fit per metric standards, with a shoulder diameter tolerance of -0.025 to 0 mm and shoulder length tolerance of 0 to 0.05 mm for exacting dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated industries worldwide.