Nominal diameter

•  3 mm
•  4 mm
•  5 mm
•  6 mm
•  8 mm
•  10 mm
•  12 mm
•  14 mm
•  16 mm
•  20 mm

Width across flats

•  5.5 mm
•  7 mm
•  8 mm
•  10 mm
•  13 mm
•  17 mm
•  19 mm
•  22 mm
•  24 mm
•  30 mm

Thread length (metric thread)

•  2.7 mm
•  3.2 mm
•  3.5 mm
•  4.5 mm
•  6 mm
•  7 mm
•  9 mm
•  10 mm
•  11 mm
•  15 mm

Harmonized System Code

•  73181692
•  73181699

Width across corners

•  6.08 mm
•  7.74 mm
•  8.87 mm
•  11.05 mm
•  14.38 mm
•  18.9 mm
•  21.1 mm
•  24.49 mm
•  26.75 mm
•  33.53 mm

Height

•  4 mm
•  5 mm
•  6 mm
•  8 mm
•  10 mm
•  12 mm
•  14 mm
•  16 mm
•  20 mm