S-91310A873 M20 x 45 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress industrial environments, reducing the risk of fastener failure.
• High hardness rating (Rockwell C32) provides superior resistance to wear and deformation, extending the screw's service life in demanding applications.
• Coarse 2.5mm thread pitch allows for quick and easy installation, saving time and labor costs during assembly processes.
• Class 6g thread fit guarantees precise threading compatibility, minimizing cross-threading issues and ensuring secure fastening.
• Fully threaded design offers consistent holding power along the entire 45mm length, enhancing stability in heavy-duty connections.
• External hex drive and hex head enable straightforward installation with standard tools, improving efficiency in maintenance and assembly operations.
• Compliance with ISO 4017 standards ensures consistent quality and interchangeability, supporting global engineering specifications and supply chain reliability.

Professional Applications & Engineering Value

This M20 hex head screw is engineered from Class 10.9 steel to address critical challenges in heavy-duty industrial settings, such as machinery assembly, structural frameworks, and automotive components. The coarse metric thread with a 2.5mm pitch and Class 6g thread fit provides robust engagement, reducing vibration-induced loosening and enhancing load distribution. With a fully threaded design and external hex drive, it simplifies installation in tight spaces, while the high tensile strength and hardness resist shear forces and environmental stressors. Ideal for applications requiring ISO 4017 certification, this screw delivers long-term reliability, minimizing downtime and maintenance costs in sectors like construction, manufacturing, and equipment repair.

Specification Summary & Compliance

This product features precise metric threading with M20 size, 2.5mm coarse pitch, and Class 6g thread fit per ISO standards. It meets ISO 4017 (equivalent to DIN 933) for dimensional accuracy and manufacturing consistency. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability in industrial use.