S-91290A164 M4 x 18 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Class 12.9 rating, 170,000 psi tensile strength, and Rockwell C37 hardness for reliable performance in high-stress applications.
• Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise and secure fastening with Class 5g6g thread fit and M4 x 0.7mm coarse threads, ensuring consistent engagement and reduced risk of loosening.
• Easy installation and removal using a standard 3 mm hex key, providing a flush, low-profile head design that saves space and resists tampering.
• Full thread coverage along the 18 mm length for maximum grip and load distribution across connected components.
• Compliance with international standards including DIN 912/ISO 4762, ensuring interchangeability and quality assurance in global projects.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory requirements for industrial use.

Professional Applications & Engineering Value

This Class 12.9 socket head cap screw is engineered for demanding applications where failure is not an option. The black-oxide alloy steel construction provides excellent resistance to corrosion and wear, making it ideal for machinery, automotive assemblies, and heavy equipment exposed to oils, moisture, and varying temperatures. Its M4 coarse thread and Class 5g6g precision fit facilitate quick assembly while maintaining tight tolerances, reducing the risk of cross-threading and vibration-induced loosening. The hex socket drive allows for high torque application in confined spaces, ensuring reliable fastening in industrial socket screw applications such as jigs, fixtures, and precision instruments. By combining high tensile strength with standardized dimensions, this screw minimizes downtime and enhances the longevity of critical connections.

Specification Summary & Compliance

This metric socket head cap screw features M4 x 0.7 mm coarse threads with a Class 5g6g thread fit, ensuring dimensional accuracy per ISO standards. It is fully threaded and measures 18 mm in length, with a head diameter of 7 mm and a 3 mm hex drive. Manufactured to meet DIN 912/ISO 4762 specifications, it also complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for use in regulated industries and environmentally conscious projects.