S-92981A158 M20 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load Distribution: 24mm shoulder diameter with precise tolerance provides superior bearing surface for rotating components, reducing wear and extending equipment life.
• High-Strength Construction: Alloy steel material with 140,000 psi tensile strength and Rockwell C32 hardness ensures reliable performance under heavy mechanical stress.
• Corrosion-Resistant Protection: Black oxide finish offers durable surface protection against oxidation in demanding industrial environments.
• Precision Thread Engagement: Class 5g6g thread fit with M20x2.5 coarse thread design ensures secure fastening and vibration resistance in high-load applications.
• Easy Installation & Maintenance: Hex socket drive with 12mm drive size allows for efficient torque application in confined spaces using standard tools.
• Standardized Compatibility: ISO 7379 compliance guarantees interchangeability and consistent performance across global industrial applications.
• Environmental Compliance: RoHS 3 and REACH compliance ensures safe usage in regulated industries and international markets.

Professional Applications & Engineering Value

This M20 shoulder screw delivers critical engineering solutions where precise alignment and rotational movement are paramount. The alloy steel construction with Black Oxide finish provides the durability needed for heavy-duty machinery, automotive assemblies, and precision manufacturing equipment. The 24mm shoulder diameter with tight tolerance control serves as an exact locating diameter for gears, pulleys, and bearings, eliminating the need for additional bushings. The 40mm shoulder length maintains component spacing while the hex socket drive enables installation in space-constrained applications. The coarse thread design with Class 5g6g fit ensures reliable engagement in high-vibration environments, making it ideal for industrial automation, robotics, and power transmission systems where precision and reliability are non-negotiable.

Specification Summary & Compliance

This precision metric shoulder screw features M20x2.5 coarse threads with Class 5g6g thread fit tolerance. The shoulder diameter maintains -0.072 to -0.01 mm tolerance while the shoulder length tolerance is 0 to 0.25 mm, ensuring precise component alignment. Manufactured to ISO 7379 specifications, the screw meets international quality standards. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for global industrial applications requiring strict material and environmental standards.