S-90278A319 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment enabled by the 5mm shoulder diameter with tight tolerances for accurate positioning
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load
• Secure installation using the 2.5mm hex socket drive that prevents stripping and allows high torque application
• Consistent thread engagement with Class 6g thread fit ensuring reliable fastening in coarse pitch applications
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries
• Optimized for automated assembly with standard socket head profile and right-hand threading for efficient production

Professional Applications & Engineering Value

This M4 shoulder screw delivers exceptional engineering value in precision assembly applications where component alignment and corrosion resistance are critical. The 18-8 stainless steel construction provides excellent durability against oxidation and chemical exposure, while the precisely machined 5mm shoulder diameter with tight tolerances ensures accurate positioning of moving parts in machinery, automation equipment, and precision instruments. The hex socket drive allows for high-torque installation without damaging the fastener head, making it ideal for confined spaces in industrial equipment. With its Class 6g thread fit and coarse thread spacing, this shoulder screw maintains reliable clamping force in vibrating environments, solving common loosening issues in manufacturing equipment, robotics, and transportation applications.

Specification Summary & Compliance

This precision metric shoulder screw features M4 x 0.7mm coarse thread with Class 6g thread fit per ISO standards, ensuring proper clearance for reliable assembly. The shoulder diameter maintains tight tolerance of -0.025 to 0 mm with shoulder length tolerance of 0 to 0.05 mm for precise component alignment. Manufactured from 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength, this fastener meets industrial performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for use in regulated industries and international markets.