Identifying two different nuts by their outer shape

Update: Refer to this article regarding the current shape of the STEMFIE nuts

Recently the community asked for an easier way to locate the spanner tool on the nuts, and now a new version of the device has been improved. 

Several users have pointed out that the two basic types of fastening nuts in the STEMFIE standard, the cam-locking, and the threaded nut, are too similar, seen from the outer shape. Therefore, a new version of both nuts was made and is now available for download from the STEMFIE file repository or by clicking on the links below.

• Nut PH CL BU1x5mm - SPN-NUT-0018
• Nut RH BU1x5mm - SPN-NUT-0001

The difference between both markings is that the nut with the traversal line is threaded; the nut with the longitudinal line is of the cam-locking type.

Thanks to the community for testing STEMFIE and suggesting improvement! :-D