S-92981A773 M2 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability and Corrosion Resistance with a black oxide finish that protects against wear and environmental factors, extending service life in demanding industrial settings.
• Superior Strength and Load-Bearing Capacity from alloy steel construction, offering a high 140,000 psi tensile strength and Rockwell C32 hardness for reliable performance under stress.
• Precise Alignment and Secure Component Positioning enabled by the 16mm shoulder length with controlled tolerances, reducing misalignment and vibration in assemblies.
• Easy and Secure Installation with a knurled socket head and hex drive, providing a non-slip grip and efficient torque application during assembly.
• Consistent Thread Engagement and Interchangeability due to Class 5g6g thread fit and coarse metric threading (M2 x 0.4mm), ensuring reliable fastening in high-volume production.
• Compliance with International Standards, meeting ASTM A108 for material quality and being RoHS 3 and REACH compliant, supporting global supply chain requirements.
• Versatile Right-Hand Thread Design for standard assembly processes, facilitating quick installation and maintenance in various machinery and equipment.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to address critical challenges in precision industrial applications, such as minimizing component shift and wear in rotating assemblies. The alloy steel material and black oxide finish provide exceptional resistance to corrosion and mechanical stress, making it ideal for environments exposed to moisture or high loads. With a 16mm shoulder length and tight diameter tolerances, it ensures accurate alignment in linkages, bearings, and pivoting mechanisms, reducing downtime and maintenance costs. The knurled socket head enhances grip for secure fastening in confined spaces, while the Class 5g6g thread fit guarantees consistent performance in automated assembly lines. Commonly used in robotics, automotive systems, and electronic enclosures, this metric shoulder screw delivers reliable engineering value by improving assembly precision and longevity.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit with precise shoulder diameter tolerance of -0.072 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm, ensuring dimensional accuracy for secure fits. It adheres to ASTM A108 specifications for material integrity and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible manufacturing and use in global markets.