S-91274A166 M12 x 30 mm ASTM B117, 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 critical applications.
• Superior corrosion resistance provided by the zinc-flake coating, extending service life and reducing maintenance costs in harsh industrial environments.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and drive features through repeated assembly and disassembly.
• Precision Class 5g6g thread fit guarantees consistent and secure mating with nuts and tapped holes, reducing assembly time and improving joint reliability.
• Fully threaded design allows for maximum adjustability and clamping force distribution along the entire length of the screw.
• Compliance with ISO 4762 and DIN 912 standards ensures dimensional accuracy and interchangeability, simplifying sourcing and inventory management for global projects.
• Hex socket drive enables high torque application and easy installation in confined spaces, enhancing assembly efficiency.

Professional Applications & Engineering Value

This M12 socket head cap screw is engineered for demanding applications where failure is not an option. The zinc-flake-coated alloy steel construction provides a robust barrier against corrosion, making it ideal for machinery, automotive assemblies, and heavy equipment exposed to moisture, chemicals, or outdoor conditions. Its Class 12.9 strength rating and coarse thread pitch ensure high clamp load retention and vibration resistance, solving common issues like loosening under dynamic loads. The fully threaded metric design offers versatile fastening solutions in structural frameworks, precision tools, and manufacturing jigs, delivering long-term reliability and reducing downtime in industrial fastening systems.

Specification Summary & Compliance

This screw features a metric M12 x 1.75 mm coarse thread with a Class 5g6g thread fit per ISO standards, ensuring precise dimensional tolerances. It is manufactured in compliance with ISO 4762 and DIN 912 specifications for socket head cap screws. The product meets ASTM B117 salt spray test requirements for corrosion resistance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, supporting sustainable and safe industrial practices.