Tysk standard
DIN 46235 (46267-1) for kopper (6-kant)
DIN 46329 (46267-2) for aluminium (6-kant)
Svensk standard
SEN 245010 for kopper (6-kant)
SEN 245012 for aluminium (dor)
Fransk standard
EDF NF C20-130 for kopper (6-kant)
EDF NH68-S90 for aluminium (dor)
