Nominal diameter

•  6 mm
•  8 mm
•  10 mm
•  12 mm

Width across flats

•  10 mm
•  13 mm
•  17 mm
•  19 mm

Width across corners

•  11.05 mm
•  14.38 mm
•  17.77 mm
•  20.03 mm

Height

•  9 mm
•  12 mm
•  14 mm
•  16 mm