S-98451A121 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance and electrical conductivity from 360 Brass material, ideal for electronics and marine environments.
• High strength-to-weight ratio with 40,000 psi tensile strength and Rockwell B55 hardness, ensuring durability under load.
• Precise alignment and reduced wear due to the 5mm shoulder diameter with tight tolerances (-0.025 to 0 mm) for stable component positioning.
• Easy installation and high torque transmission with a 2.5 mm hex socket drive, minimizing tool slippage in confined spaces.
• Reliable thread engagement with Class 6g fit and M4 x 0.7mm coarse pitch, enabling quick assembly and vibration resistance.
• Consistent dimensional accuracy across 9mm thread and 10mm shoulder lengths, supporting repeatable manufacturing processes.
• Compliance with global regulations including RoHS 3 and REACH, ensuring safe use in international markets.

Professional Applications & Engineering Value

This M4 shoulder screw in 360 Brass addresses critical engineering needs in industries like electronics, automation, and precision machinery. The socket head design with hex drive allows for secure fastening in tight spaces, reducing assembly time and improving maintenance access. Its Class 6g thread fit and coarse 0.7mm pitch provide excellent vibration resistance, preventing loosening in dynamic applications. The precise shoulder diameter ensures accurate alignment of components such as gears and bearings, minimizing wear and extending equipment life. Combined with high tensile strength and corrosion-resistant properties, it delivers reliable performance in demanding environments, from consumer electronics to industrial controls.

Specification Summary & Compliance

This metric shoulder screw features an M4 thread size with 0.7mm coarse pitch and Class 6g thread fit per ISO standards for consistent engagement. The shoulder diameter is manufactured to a tight tolerance of -0.025 to 0 mm, and the shoulder length maintains 0 to 0.05 mm tolerance for precision assembly. It complies with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloys and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations in industrial applications.