unit:mm
B
M
Pitch
T
L
5mm designation
Specified length
4.7
M2.5
0.45
6
5 ~ 25
6,7,8,11,12,13,18
M3
0.5
5 ~ 60
4~17,18,22
M4
0.7
6~12,16,18,22
7
M5
0.8
10 ~ 50
8 , 12
8
M6
1