S-92981A304 M8 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides reliable protection against rust and wear in demanding industrial environments, extending service life.
• Superior Tensile & Shear Strength: Made from high-strength alloy steel with 140,000 psi tensile strength and 84,000 psi minimum shear strength for secure, high-load applications.
• Precision Thread Fit & Assembly Reliability: Class 5g6g thread fit ensures consistent, vibration-resistant connections, reducing the risk of loosening in machinery.
• Secure Grip & Easy Installation: Knurled head texture and 5 mm hex drive allow for firm handling and efficient torque application with standard tools.
• Accurate Shoulder Dimensions for Alignment: Tight shoulder diameter tolerance (-0.072 to -0.01 mm) and length control (0 to 0.25 mm) ensure precise component positioning.
• High Hardness for Wear Resistance: Rockwell C32 hardness maintains structural integrity under repetitive stress and mechanical loads.
• Broad Industrial Compliance: Meets ISO 7379 standards and is RoHS 3/REACH compliant, ensuring safety and regulatory acceptance globally.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial applications. The alloy steel construction, combined with a black oxide finish, offers excellent resistance to corrosion and mechanical wear, making it ideal for machinery, automotive assemblies, and precision equipment. The coarse thread pitch (1.25mm) and Class 5g6g thread fit provide robust, vibration-resistant fastening, while the knurled socket head ensures secure grip during installation. The precisely machined shoulder with controlled tolerances facilitates accurate component alignment, reducing assembly errors and enhancing operational reliability in high-stress environments.

Specification Summary & Compliance

This shoulder screw features a metric M8x1.25mm coarse thread with Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy and interchangeability. Shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm. It complies with ISO 7379 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, supporting safe and sustainable industrial use.