S-98451A111 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance and excellent machinability from 360 Brass material, ideal for demanding industrial environments
• Precise component alignment and reduced assembly stress with a smooth 4mm shoulder diameter and tight -0.025 to 0 mm tolerance
• High-strength, reliable fastening performance supported by 40,000 psi tensile strength and Rockwell B55 hardness
• Secure, slip-resistant installation using a standard 2mm hex drive in a socket head design
• Consistent, vibration-resistant thread engagement with a Class 6g thread fit and coarse 0.5mm pitch for quick assembly
• Durability and long service life in precision mechanisms due to the precisely machined 4mm shoulder length
• Compliance with global environmental and safety standards, meeting RoHS 3 and REACH regulations for responsible sourcing

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and wear challenges in precision assemblies. The 360 Brass construction offers excellent corrosion resistance and non-sparking properties, making it suitable for electronics, instrumentation, and machinery where durable fastening is essential. The Class 6g thread fit and coarse 0.5mm pitch ensure quick, reliable installation with reduced risk of cross-threading. The precisely machined shoulder diameter and length provide a stable pivot or spacer, minimizing misalignment and wear in rotating parts. With a socket head hex drive, it allows for high-torque application in confined spaces, enhancing assembly efficiency and maintaining industrial reliability.

Specification Summary & Compliance

This shoulder screw adheres to Metric system standards with an M3x0.5mm coarse thread and Class 6g thread fit for consistent dimensional accuracy. The shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, ensuring precise fit in engineering applications. It is manufactured to meet RoHS 3 (2015/863/EU) compliance with exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, affirming its suitability for regulated industrial and electronic uses.