DIN 6325
Hardened Tolerances m6

*All measurements in millimeters (mm)*

d l1 z1 approx z2 approx
M1.5 0.5 0.23 0.12
M2 0.6 0.3 0.18
M2.5 0.7 0.4 0.25
M3 0.8 0.45 0.3
M4 1 0.6 0.4
M5 1.2 0.75 0.5
M6 1.5 0.9 0.6
M8 1.8 1.2 0.8
M10 2 1.5 1
M12 2.5 1.8 1.3
M14 2.5 2 1.3
M16 3 2.5 1.7
M20 4 3 2

ISO-Tolerances for Metric Fasteners

Nomimal Dimension

Tolerance Zone in mm (external measurements)
Over To h6 h8 m6
0 1 0 -0.006 0 -0.014 +0.002 +0.008
1 3 0 -0.006 0 -0.014 +0.002 +0.008
3 6 0 -0.008 0 -0.018 +0.004 +0.012
6 10 0 -0.009 0 -0.022 +0.006 +0.015
10 18 0 -0.011 0 -0.027 +0.007 +0.018
18 30 0 -0.030 0 -0.033 +0.008 +0.021

All information is strictly informative