DIN/ EN/ ISO DIFFERENCES IN SCREWS
DIN/ EN/ ISO 区别

 Gain an insight into the difference between DIN, EN and ISO standards

 深入了解DIN、EN和ISO标准之间的差异

This part is intended to assist you in the changeover from withdrawn DIN standards to current EN and/or ISO standards. Information is given on which changes of the respective product standard are relevant for application.

本部分旨在帮助您从废止的DIN标准转换为现行的EN和/或ISO标准，提供了与应用相关的产品标准变更信息。

Small slotted or cross recessed screws  小一字槽或者十字槽螺钉

When introducing the ISO standards for small screws, some of the head heights and head diameters have been changed. These changes may not have any effects on most of the applications. Only in cases with very little space for installa- tion, it is necessary to observe the changes in details. In table 1 the general changes as well as the successor ISO standard are given. Table 2 shows the head dimensions of the DIN standard and the successor ISO standard.

当引入小螺钉的ISO标准时，一些头部高度和头部直径已经改变。这些更改可能不会对大多数应用程序产生任何影响。只有在安装空间很小的情况下，才有必要详细观察变化情况。表1给出了一般变化以及后续ISO标准。表2显示了DIN标准和后续ISO标准的头部尺寸。

DIN – ISO comparison of the dimensions of small screws  DIN–ISO小螺钉尺寸比较

Small hexagon or hexalobular screws  小内六角头及内六角花形螺钉

In Germany, established product standards such as DIN 6912 or DIN 7984 are still valid. There are no successor ISO standards up to now. However, DIN 7991 has been replaced by the ISO standard 10642. Please observe that accor- ding to DIN 74 these countersunk head screws have got F-type countersinks. In recent years, hexalobular screws (TX) have been introduced additionally. There are no DIN standards for these screws.
The head geometry corresponds to cross recessed screws as the head type is identical.

在德国，既定的产品标准，如DIN 6912或DIN 7984仍然有效。目前还没有后续的ISO标准。然而，DIN 7991已被ISO标准10642取代。请注意，根据DIN 74，这些沉头螺钉有F型沉头孔。近年来，内六角花形螺钉（TX）又被引入。这些螺钉没有DIN标准，头部几何形状与十字槽螺钉相对应，因为头部类型相同。

DIN – ISO comparison of the dimensions of small hexalobular screws  DIN–ISO小内六角花形螺钉尺寸比较

DIN – ISO comparison of the dimensions of hexagon socket countersunk head screws DIN–ISO 小内六角沉头螺钉尺寸比较

Screws with normal cylindrical head  常规内六角头型螺钉

DIN 912 has been replaced by ISO 4762. Some nominal Ø known from the DIN standards are no longer included in the successor ISO standard. Furthermore, an additional standard for screws with metric fine pitch thread has been published. The geometric design of ISO 4762 corresponds to DIN 912, so there are no restrictions on use expected. In addition, there is a new standard for hexalobular socket head cap screws (TX). In comparison to the hexagon drive, the hexalobular drive ensures a better load transmission and less wear of the drive.

DIN 912已被ISO 4762取代。DIN标准中已知的一些尺寸标称Ø不再包含在后续ISO标准中。此外，还出版了公制细牙螺纹螺钉的附加标准。ISO 4762的几何设计符合DIN 912，因此预期的使用没有限制。此外，内六角花形圆柱头螺钉（TX）有了新的标准。与内六角六边形传动相比，六角花形传动确保了更好的载荷传递和更少的磨损。

Other Screws  其他螺钉