It means the steel is cold-rolled to a smooth, shiny finish (often with surface roughness Ra ≤ 1.0 µm), then typically oiled to prevent rust. It is not hot-rolled, pickled, or coated.

Last updated: 2025. Due to potential updates in European harmonized standards, always check with your local standards body (DIN, CEN, ISO) for the most current material specifications.

But what exactly does this standard cover? Why is it still referenced decades after its withdrawal? And crucially, how can you legally obtain a for your project? This article provides a deep dive into the history, technical specifications, material properties, and current status of the DIN 1624 standard.

For legal and compliance reasons, the most reliable source is the original publisher.

Understanding DIN 1624: The Global Standard for 4-Prong Tee Nuts