Bolt
diamoter
d1 Basic H Basic B C
App
R
Min
S Pitch
Tolerance Tolerance
Basic Tolerance finish semi-
finish
regular finish semi-
finish
regular coarse fine
finish semi-
finish
regular
M6 6 0
-0.1

0
-0.2
+0.6
-0.15
4 ±0.15 ±0.25 ±0.6 10 0
-0.2
0
-0.6
0
-0.6
11.5 0.25 18 1 -
M8 8 0   +0.7 5.5       13 0 0 0 15 0.4 22 1.25 1
M10 10 -0.15   -0.2 7       17 -0.25 -0.7 -0.7 19.6 0.4 26 1.5 1.25
M12 12       8   ±0.3 ±0.8 19       21.9 0.6 30 1.75 1.25
(M14) 14   0 +0.9 9       22 0 0 0 25.4 0.6 34 2 1.5
M16 16   -0.25 -0.2 10       24 -0.35 -0.8 -0.8 27.7 0.6 38 2 1.5
(M18) 18 0     12       27       31.2 0.6 42 2.5 1.5
M20 20 -0.2     13 ±0.2     30       34.6 0.8 46 2.5 1.5
(M22) 22       14   ±0.35 ±0.9 32       37 0.8 50 2.5 1.5
M24 24   0 +0.95 15       36       41.6 0.8 54 3 2
(M27) 27   -0.35 -0.35 17       41 0 0 0 47.3 1 60 3 2
M30 30       19       46 -0.4 -1.0 -1.0 53.1 1 66 3.5 2
(M33) 33 0 0 +1.2 21       50       57.7 1 72 3.5 2
M36 36 -0.25 -0.4 -0.4 23 ±0.25 ±0.4 ±1.0 55 0 0 0 63.5 1 78 4 3
M42 42       26       65 -0.45 -1.2 -1.2 75 1.2 90 4.5 -