Hex chamfered single face
Flat round head
Cheese
Square
T-head
Triangle
Y-shape
Hex chamfered double faces
Cheese with shoulder
Octagonal
DIN 431-1982
Octagon pipe nuts with thread as in ISO 228-1
DIN 431-2000
Octagon pipe nuts with thread as in ISO 228-1
DIN 431-2013
Octagon pipe nuts with thread as in ISO 228-1
DIN 80705-1990
Thin octagon nuts with coarse pitch and fine pitch thread and with small widths across flats
DIN 80705-2017
Thin octagon nuts with coarse pitch and fine pitch thread and with small widths across flats
