S-90323A328 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh environments.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B95 hardness for reliable performance under high-stress conditions.
• Precise component alignment due to the accurate shoulder diameter tolerance (-0.025 to 0 mm), reducing assembly errors and improving product quality.
• Space-saving low-profile socket head with 2.5 mm drive size, allowing for installation in confined spaces while providing secure hex drive engagement.
• Consistent and reliable threading with Class 6g fit and coarse M4x0.7 thread, ensuring easy assembly and strong fastening in industrial applications.
• Durable and compliant material meeting RoHS 3 and REACH regulations, making it safe for various industries and environmentally conscious projects.
• Optimized shoulder length of 20mm with tight tolerance (0 to 0.05 mm), providing stable support and precise positioning in mechanical assemblies.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. Made from 18-8 stainless steel with a passivated finish, it resists corrosion and wear, extending service life in machinery, automation systems, and precision instruments. The low profile socket head and hex drive design facilitate easy installation in tight spaces, while the precise shoulder fit and 20mm shoulder length ensure accurate component positioning, reducing vibration and misalignment issues. With a coarse metric thread (M4x0.7) and Class 6g thread fit, it offers reliable fastening in high-stress environments, making it ideal for use in assembly jigs, rotating shafts, and electronic enclosures where precision and strength are paramount.

Specification Summary & Compliance

This shoulder screw features a metric thread size M4x0.7 with Class 6g thread fit and precise shoulder diameter tolerance of -0.025 to 0 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. The manufacturing adheres to standard metric specifications for consistent performance in industrial settings.