S-92981A782 M5 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Crafted from alloy steel and hardened to Rockwell C32, this shoulder screw provides superior resistance to wear and fatigue in demanding mechanical assemblies.
• High Tensile Strength: With a 140,000 psi tensile strength, it reliably handles high-stress applications, reducing the risk of fastener failure and maintenance downtime.
• Precision Shoulder for Accurate Alignment: The 80mm shoulder length with controlled tolerances ensures exact component positioning, minimizing misalignment and vibration in rotating assemblies.
• Corrosion-Resistant Black Oxide Finish: The black oxide coating offers enhanced protection against rust and oxidation, extending the screw's service life in various industrial environments.
• Secure and Easy Installation: The knurled socket head with a 3mm hex drive provides a non-slip grip for secure tightening, even in confined spaces, improving assembly efficiency.
• Reliable Thread Performance: The M5 x 0.8mm coarse thread with Class 5g6g fit ensures consistent engagement and ease of assembly, reducing cross-threading risks.
• Compliance with Industry Standards: Meets ASTM A108 specifications and is RoHS 3 and REACH compliant, ensuring material quality and environmental safety for global supply chains.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial applications. The precision-machined shoulder acts as a reliable locating dowel or pivot point in assemblies such as gears, pulleys, and linkages, ensuring components rotate concentrically without slippage. Made from high-strength alloy steel and finished with a protective black oxide layer, it combats corrosion and wear in harsh operational environments. The coarse metric thread (M5x0.8) and Class 5g6g thread fit facilitate quick, secure fastening, while the knurled socket head with a 3mm hex drive allows for high-torque installation. Ideal for precision machinery, automotive systems, and automation equipment, this fastener enhances assembly accuracy, reduces maintenance, and improves overall mechanical reliability.

Specification Summary & Compliance

This shoulder screw features an M5 x 0.8mm coarse thread with a Class 5g6g thread fit and a 10mm thread length for reliable engagement. The shoulder diameter is 6mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 80mm with a tolerance of 0 to 0.25 mm, ensuring precise dimensional control. It is manufactured in accordance with ASTM A108 and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing adherence to strict material and environmental standards.