S-90323A448 M4 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 environments.
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B95 hardness to withstand high-stress applications.
• Precise component alignment ensured by the 5mm shoulder diameter with tight tolerance (-0.025 to 0mm) for reduced assembly errors.
• Easy installation and high torque capability with the 2.5mm hex socket drive and low-profile head design.
• Reliable thread engagement due to Class 6g thread fit and coarse M4 x 0.7mm thread for secure fastening.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use.
• Versatile industrial suitability with metric dimensions and right-hand thread for global machinery and equipment standards.

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 construction, enhanced by a passivated finish, provides excellent resistance to corrosion and wear, making it ideal for applications in automotive, aerospace, and electronic enclosures where exposure to moisture and chemicals is common. The precise shoulder diameter of 5mm with minimal tolerance ensures accurate positioning of components, reducing vibration and misalignment issues. Combined with a socket head and hex drive, it allows for efficient installation in confined spaces, improving assembly speed and reliability. This screw’s high tensile strength and Class 6g thread fit further contribute to secure, long-term performance in dynamic industrial environments.

Specification Summary & Compliance

This precision shoulder screw features metric dimensions including an M4 x 0.7mm thread with Class 6g fit for consistent threading. The shoulder diameter is tightly controlled at 5mm with a tolerance of -0.025 to 0mm, and the shoulder length is 2mm with a 0 to 0.05mm tolerance, ensuring high precision. Manufactured from 18-8 stainless steel with a passivated finish, it meets industry standards for durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in industrial applications.