S-97713A138 M20 DIN 609 Shoulder Screws

Key Features & Benefits at a Glance

• High tensile strength of 120,000 psi ensures reliable performance in demanding mechanical assemblies and reduces the risk of fastener failure.
• Precision shoulder dimensions with a 21mm diameter and tight 0.002-0.015mm tolerance provide exact alignment and smooth rotation for pivots, gears, and linkages.
• Class 6g thread fit offers consistent, secure fastening with standard M20x2.5 coarse threads, simplifying installation and improving assembly efficiency.
• Durable steel construction with Rockwell C20 hardness resists wear and deformation, extending service life in high-stress industrial environments.
• External hex head design allows for easy installation and removal with common tools, reducing assembly time and maintenance efforts.
• Compliance with DIN 609 ensures dimensional consistency and interchangeability, supporting seamless integration in European machinery and equipment.
• RoHS 3 and REACH compliance guarantees environmental safety and material sustainability, meeting global regulatory requirements for industrial components.

Professional Applications & Engineering Value

This M20x2.5 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision machinery. The steel construction, combined with a Rockwell C20 hardness and 120,000 psi tensile strength, provides exceptional resistance to shear forces and fatigue, making it ideal for high-stress applications like robotic arms, conveyor systems, and automotive assemblies. The 21mm shoulder diameter with minimal tolerance ensures precise locating and reduced play in rotating components, while the Class 6g metric thread and coarse pitch facilitate quick, secure fastening. Its external hex drive and smooth head texture further enhance installation efficiency, reducing downtime in production lines. By integrating DIN 609 standards, this screw delivers reliable performance in industrial settings, ensuring durability and compliance with international specifications.

Specification Summary & Compliance

This shoulder screw adheres to metric dimensions with a Class 6g thread fit and coarse thread spacing (M20x2.5), ensuring compatibility with standard components. The shoulder features a diameter of 21 mm with a tight tolerance of 0.002 to 0.015 mm and a length of 55.5 mm (-1 to 0 mm tolerance), providing high precision for alignment-critical applications. It meets DIN 609 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial markets.