Deutsches Institut für Normung (German Institute for Standardization), or DIN, is a frequently used (and even recommended) standard in the Netherlands. There are more than 400 DIN standards for fastening materials and approximately 100 DIN standards for screw threads. These standards provide transparent technical information for both the supplier and the customer and help prevent any misunderstanding about the product to be delivered. A product of DIN grade, type, and size is always the same. Additionally, there is also the NEN, Nederlands Normalisatie Instituut (Netherlands Standardization Institute) standard and the ISO (International Organisation for Standardisation) standard, whereby the ISO standard often concurs with a DIN standard.