S-90323A451 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for long-lasting performance in harsh environments.
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B95 hardness for reliable load-bearing in demanding applications.
• Precise component alignment enabled by the accurately machined 5mm shoulder diameter and 7mm shoulder length with tight manufacturing tolerances.
• Easy and secure installation using the standard 2.5mm hex drive and low-profile socket head, minimizing the risk of stripping.
• Consistent thread engagement ensured by the Class 6g thread fit and M4 x 0.7mm coarse pitch, providing reliable fastening in various materials.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains.
• Optimized for automated assembly due to its right-hand metric thread and smooth head texture, facilitating efficient high-volume production.

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 oxidation and chemical exposure, making it ideal for machinery, automotive, and electronic enclosures operating in corrosive settings. The precise shoulder with minimal diameter and length tolerances acts as a reliable pivot or spacer, ensuring accurate component positioning and reducing wear in rotating mechanisms. Its Class 6g thread fit and coarse pitch enable quick installation and robust holding power, while the hex drive design allows for high-torque application without slippage. These features collectively minimize maintenance downtime and enhance the longevity of assembled products.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M4 thread size and 0.7mm coarse pitch. The thread is manufactured to Class 6g tolerance for consistent fit. The shoulder diameter is maintained at 5mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 7mm with a tolerance of 0 to 0.05 mm, ensuring precise fit in assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications.