S-92981A521 M12 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion protection with black oxide finish extending service life in demanding industrial environments
• Precision shoulder alignment with 16mm diameter and tight tolerance control for accurate component positioning
• High-strength performance from alloy steel construction with Rockwell C32 hardness for reliable load-bearing capability
• Secure hex drive engagement with 8mm socket head preventing cam-out and ensuring proper installation torque
• Optimized thread engagement with Class 5g6g fit and coarse 1.75mm pitch for faster assembly and vibration resistance
• Industry-standard compatibility meeting ISO 7379 specifications for consistent performance across global applications
• Environmental compliance assurance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This M12 shoulder screw delivers critical engineering solutions for precision assembly applications where component alignment and rotational accuracy are paramount. The 16mm shoulder diameter with controlled tolerances provides exact locating surfaces for bearings, gears, and rotating components, eliminating the need for additional alignment fixtures. Manufactured from alloy steel and treated to Rockwell C32 hardness, this fastener maintains dimensional stability under mechanical stress while the black oxide finish provides essential corrosion resistance in industrial environments. The coarse thread pitch (1.75mm) ensures rapid installation and superior resistance to vibration loosening in machinery, automotive, and automation equipment. The hex socket drive allows for high-torque installation in confined spaces, making it ideal for precision engineering applications requiring reliable, repeatable fastening performance.

Specification Summary & Compliance

This precision shoulder screw features M12x1.75mm coarse threads with Class 5g6g thread fit per ISO metric standards, ensuring consistent engagement and reliable performance. The 16mm shoulder diameter maintains tight tolerance control (-0.072 to -0.01 mm) while the 35mm shoulder length features minimal variation (0 to 0.25 mm). Manufacturing and quality control adhere to ISO 7379 specifications, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making this fastener suitable for global industrial applications requiring certified components.