S-90373A137 M20 x 60 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior hardness rating of Rockwell C39 provides excellent resistance to wear and deformation, extending service life.
• Fully threaded design offers consistent gripping power along the entire length, enhancing joint stability and load distribution.
• Coarse thread pitch (2.5mm) allows for quicker installation and better performance in materials prone to vibration or thermal expansion.
• External hex drive and hex head facilitate easy installation and removal with standard tools, improving assembly efficiency.
• Compliance with ISO 4017 (DIN 933) guarantees dimensional accuracy and interchangeability, ensuring seamless integration into global projects.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, supporting sustainable and responsible manufacturing practices.

Professional Applications & Engineering Value

This M20 hex head screw is engineered from high-grade steel with a Class 12.9 strength rating, making it ideal for demanding industrial environments such as heavy machinery, construction frameworks, and automotive assemblies. The fully threaded metric bolt design, combined with a coarse thread pitch, addresses common challenges like vibration loosening and rapid assembly needs, providing secure fastening in dynamic load conditions. Its external hex drive ensures straightforward installation with standard wrenches, reducing labor time and minimizing tooling costs. By meeting ISO 4017 standards, this heavy-duty hex bolt delivers consistent performance and reliability, crucial for engineering projects requiring precision and durability under high tensile stresses.

Specification Summary & Compliance

This fastener features a M20 thread size with a 2.5mm coarse pitch and Class 6g thread fit for precise dimensional tolerances. It adheres to ISO 4017 (equivalent to DIN 933) manufacturing specifications, ensuring uniformity and compatibility. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for environmentally conscious applications.