粗牙 M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27)
细牙 M8X1 M10X1 M12X1.5/1.25 (M14X1.5) M16X1.5 (M18X1.5) M20X2/1.5 (M22X1.5) M24X2 (M27X2)
d 8 10 12 14 16 18 20 22 24 27
k 5.3 6.4 7.5 8.8 10 11.5 12.5 14 15 17
l ≤125 22 26 30 34 38 42 46 50 54 60
125≤ l ≤200 28 32 36 40 44 48 52 56 60 66
l >200 41 45 49 57 57 61 65 69 73 79
e 外接圆 14.38 17.77 20.03 23.36 26.75 30.14 33.53 37.72 39.98 45.2
s 内接圆 13