S-90323A449 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 environments.
• Precise component alignment thanks to the accurately machined shoulder with tight diameter and length tolerances, reducing assembly errors.
• High-strength performance offering 80,000 psi tensile strength and Rockwell B95 hardness for demanding mechanical applications.
• Secure and reliable fastening with a Class 6g thread fit and coarse 0.7mm pitch, providing excellent vibration resistance and easy installation.
• Space-saving low-profile socket head with a 2.5mm hex drive, allowing for compact designs and tool access in confined spaces.
• Compliance with stringent regulations including RoHS 3 and REACH, ensuring safety and environmental responsibility for global supply chains.
• Consistent dimensional accuracy in line with metric standards, guaranteeing interchangeability and seamless integration with existing components.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical challenges in precision assembly, such as misalignment and component wear. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to corrosion and oxidation, making it ideal for use in humid or chemically aggressive settings like industrial machinery, automotive systems, and electronic enclosures. The precise shoulder with controlled tolerances ensures accurate positioning of moving parts, reducing friction and extending equipment lifespan. Its low-profile socket head and hex drive facilitate quick installation in tight spaces, while the Class 6g thread fit and coarse 0.7mm pitch enhance grip and vibration resistance, preventing loosening under dynamic loads. This design delivers reliable performance in applications requiring high tensile strength and dimensional stability, from robotics to precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M4 thread size and 0.7mm coarse pitch, ensuring compatibility with international components. The thread fit is Class 6g, providing precise engagement and tolerance control. Key dimensional accuracies include a shoulder diameter of 5 mm with a tolerance of -0.025 to 0 mm and a shoulder length of 3 mm with a tolerance of 0 to 0.05 mm, supporting precise assembly requirements. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.