The world of standards is in motion. Just a few decades ago, DIN screws were the dominant standard. Today, German-speaking countries also use connecting elements according to international ISO standards and European EN standards. However, that does not mean that
the DIN screw is by any means outdated. DIN standard screws are common in many industries and continue to prove their worth.
Standards are not legally binding
Legally, there is no compelling reason to use a newer ISO standard as a designation for screws that are already well known. This is because standardization institutes like DIN in Berlin are associations and not government authorities, so standards only ever come as recommended. For this reason, we prefer to stock screws under the standard used on the market. This is the quickest way for you to find the screws you are looking for. Wherever there is a second standard, we list it in brackets.
For example:
DIN 7 (ISO 2338) cylindrical pins, Form A:
The newer ISO standard is identical, but the screws are mainly traded as DIN.
DIN 931 (~ ISO 4014) hexagon screws with a shank:
The special character ~ in front of the standard indicates that the ISO standard is similar, but not completely identical.
In this case, four key widths differ.
A corresponding standard exists in another class. Some of the ISO standards introduced in this way are not completely identical,
as the example for DIN 931 above shows. Before you change the standard in such cases, make sure you know for which screws
and nuts the dimensions have changed. Otherwise, it may occur that your tools do not fit as they should.
