S-91274A151 M8 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 in the most demanding heavy-duty applications, preventing fastener failure under extreme loads.
• Superior corrosion resistance from the zinc-flake coating protects the alloy steel core, significantly extending service life in harsh or outdoor industrial environments.
• High hardness rating (Rockwell C37) provides excellent wear resistance and durability, maintaining thread integrity through repeated assembly and disassembly.
• Precision Class 5g6g thread fit guarantees smooth and accurate installation, reducing the risk of cross-threading and ensuring a secure, vibration-resistant connection.
• Standard hex socket drive (6mm) allows for high torque application and easy installation in confined spaces where wrench clearance is limited.
• Fully threaded design offers consistent clamping force along the entire 30mm length, providing versatile fastening solutions for various material thicknesses.
• Compliance with major international standards (ISO 4762, DIN 912) ensures interchangeability, quality, and reliability for global engineering projects.

Professional Applications & Engineering Value

This M8 socket head cap screw is engineered to solve critical challenges in heavy-duty industrial applications. The Class 12.9 alloy steel construction, combined with a zinc-flake coating, directly addresses the dual needs for extreme tensile strength and long-term corrosion resistance. This is vital in machinery, automotive assemblies, and construction equipment where vibration and exposure to elements can compromise standard fasteners. The coarse thread (1.25mm pitch) and precise Class 5g6g thread fit enable quicker assembly and a more reliable grip in brittle materials or where high vibration loosening is a concern. The hex drive design ensures that high clamping forces can be applied efficiently, making it an indispensable component for engineers and procurement specialists who prioritize precision and reliability in their B2B supply chain.

Specification Summary & Compliance

This screw features a metric M8 x 1.25mm coarse thread with a Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy. It is manufactured to meet the dimensional specifications of ISO 4762 and DIN 912. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The corrosion-resistant coating is tested per ASTM B117 standards, validating its performance for industrial use.