S-92981A038 M4 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides superior protection against rust and wear in harsh industrial environments, extending the screw's service life.
• High-Strength Performance: Made from alloy steel with a tensile strength of 140,000 psi and Rockwell C32 hardness, ensuring reliable load-bearing capacity and resistance to deformation under stress.
• Precision Alignment & Reduced Wear: The 5mm shoulder diameter with tight tolerance (-0.072 to -0.01 mm) ensures accurate component positioning, minimizing misalignment and part wear in assemblies.
• Secure & Efficient Fastening: Coarse M4 x 0.7mm thread with Class 5g6g fit offers quick installation and robust holding power, ideal for high-vibration applications.
• Easy Installation in Confined Spaces: Socket head with 2.5 mm hex drive allows for straightforward torque application using standard tools, even in limited access areas.
• Compliance with International Standards: Meets ISO 7379 specifications for dimensional accuracy, ensuring interchangeability and reliability in global engineering projects.
• Environmental & Safety Assurance: RoHS 3 and REACH compliant, making it safe for use in regulated industries without hazardous substances.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The alloy steel construction, combined with a black oxide finish, provides exceptional resistance to corrosion and mechanical stress, making it ideal for applications in automotive, aerospace, and manufacturing where durability is paramount. The 16mm shoulder length and precise diameter tolerance enable exact alignment of rotating parts, such as gears and pulleys, reducing friction and preventing premature failure. Its coarse metric thread ensures rapid assembly and high shear strength (84,000 psi minimum), securing components in high-vibration environments. By integrating ISO 7379 compliance, this screw guarantees consistent performance, streamlining maintenance and enhancing operational efficiency in demanding settings like robotics and conveyor systems.

Specification Summary & Compliance

This shoulder screw features a metric M4 x 0.7mm coarse thread with a Class 5g6g thread fit for precise engagement, alongside a shoulder diameter tolerance of -0.072 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm to ensure accurate assembly. It is manufactured in accordance with ISO 7379 standards for dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental suitability for industrial use.