S-91290A210 M8 x 40 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, preventing fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide coating on alloy steel extends service life and maintains integrity in harsh industrial environments.
• Precision Class 5g6g thread fit guarantees consistent engagement and secure fastening, reducing the risk of loosening from vibration.
• High Rockwell C37 hardness provides excellent wear resistance, maintaining thread integrity and drive features through repeated use.
• Standard hex socket drive allows for high torque application and easy installation in confined spaces with common tools.
• Full compliance with DIN 912/ISO 4762 ensures dimensional accuracy and interchangeability, simplifying procurement and assembly processes.
• RoHS 3 and REACH compliance confirms environmental and safety standards are met, supporting responsible manufacturing and supply chain requirements.

Professional Applications & Engineering Value

This M8 socket head cap screw is engineered for heavy-duty industrial applications where failure is not an option. The Class 12.9 alloy steel construction, combined with a black-oxide surface treatment, provides a robust solution that resists corrosion and withstands high stress, making it ideal for machinery, automotive assemblies, and precision equipment. The coarse 1.25mm pitch metric thread and right-hand thread direction ensure quick assembly and disassembly, while the fully threaded design offers uniform clamping force. Its 6mm hex drive and standard socket head profile facilitate secure tool engagement, reducing slippage and damage during high-torque installation, ultimately enhancing operational reliability and reducing maintenance downtime.

Specification Summary & Compliance

This socket head cap screw features an M8 x 1.25mm thread with Class 5g6g thread fit per ISO metric standards, ensuring precise dimensional tolerances. It is manufactured in compliance with DIN 912 and ISO 4762 specifications for socket head cap screws, confirming consistent quality and performance. The product fully meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, affirming its adherence to environmental and health safety standards.