S-92981A791 M5 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides reliable protection against rust and wear in harsh industrial environments.
• High Tensile Strength for Demanding Applications: Alloy steel construction delivers 140,000 psi tensile strength, ensuring secure fastening under heavy loads.
• Precision Thread Fit for Secure Assembly: Class 5g6g thread fit guarantees tight, consistent engagement, reducing the risk of loosening.
• Knurled Head for Improved Grip: Knurled socket head design allows for easy manual handling and tool-free adjustments during installation.
• Standardized Dimensions for Reliable Interchangeability: Metric M5x0.8 coarse thread and 35mm shoulder length ensure compatibility with standard components.
• Hex Drive for Efficient Torque Application: 3 mm hex drive enables high torque transfer with standard tools, speeding up assembly processes.
• Compliance with Industry Standards: Meets ASTM A108, RoHS 3, and REACH regulations for safe, environmentally conscious use in global markets.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered from alloy steel with a black oxide finish to address critical needs in precision machinery, automation systems, and heavy-duty equipment. The 35mm shoulder length provides exact axial positioning for rotating parts like gears and pulleys, minimizing misalignment and wear. With a Class 5g6g thread fit and coarse M5x0.8 metric thread, it ensures rapid assembly and vibration resistance in high-stress environments. The knurled socket head enhances grip for manual adjustments, while the hex drive allows efficient torque application. Ideal for industrial applications requiring high tensile strength and dimensional accuracy, this screw supports reliable performance in robotics, conveyor systems, and automotive assemblies, reducing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter of 6.5 mm with a tolerance of -0.072 to -0.01 mm and a shoulder length of 35 mm with a tolerance of 0 to 0.25 mm. The thread fit adheres to Class 5g6g under ISO metric standards, ensuring consistent performance. It complies with ASTM A108 for material specifications, RoHS 3 (2015/863/EU) for restricted hazardous substances, and REACH (EC 1907/2006) for chemical safety, making it suitable for regulated industrial and international use.