S-92981A788 M5 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Durability – Alloy steel construction with Rockwell C32 hardness ensures long-lasting performance in demanding industrial environments.
• Precision Fit & Alignment – Class 5g6g thread fit and tight shoulder diameter tolerance (-0.072 to -0.01 mm) provide accurate, secure assembly with minimal play.
• Corrosion Resistance – Black oxide finish protects against rust and wear, extending service life in harsh conditions.
• High Tensile Strength – 140,000 psi tensile strength supports heavy-duty applications without failure.
• Easy Installation & Grip – Knurled socket head with 3 mm hex drive allows for quick, slip-resistant tightening using standard tools.
• Versatile Shoulder Design – 20mm shoulder length with standard fit acts as a reliable pivot, spacer, or bearing surface in mechanical assemblies.
• Compliance Assurance – Meets ASTM A108, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address common industrial challenges like misalignment, wear, and component failure. The alloy steel material and black oxide finish provide superior resistance to corrosion and mechanical stress, making it ideal for precision machinery, automotive systems, and robotics. The metric coarse thread (M5x0.8) and right-hand thread direction ensure quick, secure fastening, while the 20mm shoulder length with controlled tolerances serves as an accurate locating dowel or rotational axis. By integrating a knurled socket head and hex drive, it simplifies maintenance and reduces installation time, enhancing productivity in industrial shoulder screw applications where reliability is critical.

Specification Summary & Compliance

This shoulder screw features Class 5g6g thread fit per metric standards, with shoulder diameter tolerance of -0.072 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm for precise assembly. It complies with ASTM A108 for material specifications, RoHS 3 (2015/863/EU) for restricted substances, and REACH (EC 1907/2006) for chemical safety, ensuring adherence to global engineering and environmental regulations.