Problems in mechanical manufacturing: How big is the bottom hole of m3m4m5m6m8m1m12m14 braces (for steel braces)?

the bottom hole sizes of m3, M4, M5, M6, M8, M1, M12 and M14 braces are as follows:

the bottom hole size of m3 braces is 4.7 ~ 5.2 mm.

The size of the bottom hole of p>M4 braces is 5.2 ~ 5.5 mm..

The size of the bottom hole of p>M5 braces is 5.5 ~ 6. mm..

The size of the bottom hole of p>M6 braces is 6. ~ 6.5 mm..

the size of the bottom hole of p>M8 braces is 6.5~7.mm ..

the size of the bottom hole of p>M1 braces is 7. ~ 7.5 mm.

the size of the bottom hole of p>M12 braces is 7.5 ~ 8. mm.

the size of the bottom hole of p>M14 braces is 8. ~ 8.5 mm.

the above data can be used for reference, and it needs to be adjusted according to the specific situation in practical application.