S-91290A074 M20 x 130 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads, minimizing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide coating protects against rust and degradation, extending service life in harsh industrial environments.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive features through repeated use.
• Precise Class 5g6g thread fit guarantees smooth assembly and secure fastening, reducing installation time and improving joint reliability.
• Partially threaded design allows for precise clamping force application, ideal for applications requiring specific unthreaded shank sections.
• Standard hex drive (17mm) offers common tool compatibility and high torque transmission, preventing stripping and ensuring efficient installation.
• Compliance with major international standards including DIN 912/ISO 4762 ensures dimensional consistency and interoperability with other metric components.

Professional Applications & Engineering Value

This M20 socket head cap screw delivers critical engineering value in heavy-duty applications where failure is not an option. The Class 12.9 alloy steel construction provides the ultimate in tensile strength and fatigue resistance, making it ideal for high-stress points in machinery, automotive assemblies, and structural frameworks. The coarse 2.5mm pitch metric thread enables rapid assembly in tough materials while maintaining superior holding power. With its black-oxide surface treatment, this fastener resists corrosion in environments exposed to moisture, chemicals, and temperature variations. The partially threaded configuration and precise Class 5g6g thread fit ensure optimal clamp load distribution, preventing joint loosening from vibration – a common challenge in industrial settings.

Specification Summary & Compliance

This metric socket head cap screw features M20 x 2.5mm coarse threads with Class 5g6g thread fit tolerance and 52mm minimum thread length. Manufacturing conforms to DIN 912/ISO 4762 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use worldwide.