S-92981A161 M20 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with a durable black oxide finish, extending service life in harsh industrial environments.
• Exceptional mechanical strength with a tensile strength of 140,000 psi and shear strength of 84,000 psi, ensuring reliable performance under high-stress loads.
• Precision fit and alignment thanks to the Class 5g6g thread fit and controlled shoulder diameter tolerance, reducing wear and improving assembly accuracy.
• High hardness rating of Rockwell C32 for excellent wear resistance and reduced risk of stripping or deformation during installation.
• Convenient installation and removal with a 12 mm hex socket drive, allowing for high-torque application in confined spaces.
• Broad compliance with international standards including ISO 7379, RoHS 3, and REACH, ensuring safety and environmental responsibility.
• Versatile coarse thread (M20x2.5) with right-hand direction for quick assembly and strong holding power in various materials.

Professional Applications & Engineering Value

This M20 shoulder screw is engineered from alloy steel to address critical needs in heavy-duty machinery, automation systems, and precision equipment. The black oxide finish provides a robust barrier against rust and corrosion, making it ideal for applications exposed to moisture, chemicals, or outdoor elements. Its shoulder design ensures precise component alignment, reducing radial play and minimizing wear on moving parts. The socket head with hex drive allows for secure, high-torque fastening in tight spaces, enhancing assembly efficiency. With a coarse metric thread and high tensile and shear strength, it delivers reliable performance in dynamic load conditions, from conveyor systems to robotic arms, ensuring long-term operational integrity and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 specifications, with a Class 5g6g thread fit ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is controlled between -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm for precise assembly. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and safe industrial use.