S-98621A128 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced durability and reduced wear thanks to the TiCN coating, extending service life in high-friction applications.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load.
• Precise component alignment ensured by the smooth, accurately machined shoulder with a 5mm diameter and 14mm length.
• Secure and efficient installation using a standard 2.5 mm hex drive, preventing cam-out and ensuring proper torque application.
• Consistent and reliable thread engagement with a Class 6g thread fit for metric M4x0.7 coarse threads, reducing the risk of cross-threading.
• Compliance with environmental and safety standards, being RoHS 3 and REACH compliant for use in regulated industries.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and wear challenges in precision assemblies. The 18-8 stainless steel base material provides excellent corrosion resistance, while the TiCN coating significantly reduces friction and wear in dynamic applications such as machinery linkages, automotive components, and electronic enclosures. The precise shoulder fit with tight diameter and length tolerances ensures accurate positioning of moving parts, minimizing vibration and misalignment. Its metric coarse thread (M4x0.7) and Class 6g thread fit offer reliable fastening in industrial shoulder screw applications, reducing assembly time and improving overall mechanical integrity. This makes it an ideal choice for engineers seeking durability, precision, and regulatory compliance in demanding environments.

Specification Summary & Compliance

This shoulder screw features a Class 6g thread fit for the M4x0.7 metric coarse thread, ensuring dimensional accuracy per standard metric specifications. The shoulder diameter is 5 mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 14 mm with a tolerance of 0 to 0.05 mm, providing a precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in products requiring adherence to environmental and safety standards.