S-90323A456 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
• Precise component alignment ensured by a 35mm shoulder with tight length tolerance (0 to 0.05mm) and precise fit.
• High-strength performance delivering 80,000 psi tensile strength and Rockwell B95 hardness for reliable, durable connections.
• Secure, low-profile installation using a 2.5mm hex drive in a low socket head, minimizing protrusion in compact assemblies.
• Consistent thread engagement with Class 6g metric coarse thread (M4 x 0.7mm), providing reliable fastening in right-hand applications.
• Environmental compliance assurance meeting RoHS 3 and REACH regulations, supporting sustainable and safe manufacturing practices.
• Optimized shoulder diameter of 5mm with controlled tolerance, facilitating accurate positioning in mating parts.

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, combined with a passivated finish, offers excellent corrosion resistance, making it suitable for machinery, automation systems, and electronic enclosures exposed to moisture or chemicals. The 35mm shoulder length with minimal tolerance ensures precise location of components like gears, pulleys, or bearings, reducing wear and misalignment. The low-profile socket head and hex drive allow for easy installation in confined spaces, while the Class 6g thread fit and coarse pitch enable quick, secure fastening. Ideal for applications requiring high tensile strength and repeatable accuracy, this fastener enhances reliability in industrial settings, from manufacturing equipment to robotics.

Specification Summary & Compliance

This shoulder screw features a metric M4 x 0.7mm coarse thread with Class 6g thread fit for standard compatibility. Dimensions include a shoulder diameter of 5mm (tolerance: -0.025 to 0 mm) and shoulder length of 35mm (tolerance: 0 to 0.05 mm), ensuring precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for environmentally conscious and regulated industries.