对边宽度
emin 26.75 smax 24 smin 23.67 mm
M18
P 1.5/2/2.5 emin 29.56 kmax 15 kmin 14.3 smax 27 smin 26.16
M20
P 1.5/2/2.5 emin 32.95 kmax 16 kmin 14.9 smax 30 smin 29.16
M 22
P 1.5/2/2.5 emin 35.03 kmax 18 kmin 16.9 smax 32 smin 31
M 24
P 2/3 emin 39.55 kmax 19 kmin 17.7 smax 36 smin 35
M 27
P 2/3 emin 45.2 kmax 22 kmin 20.7 smax 41 smin 40