Dimensions mm · values as the standard states them Grade A Grade B
Size P s s e e k k dw dw da c a r kwb kwb M1.6 0.35 3.02 – 3.2
2.9 – 3.2
≥ 3.41
≥ 3.28
1.1
0.975 – 1.225
1.1
0.9 – 1.3
≥ 2.27
≥ 2.3
≤ 2
0.1 – 0.25
0.35 – 1.05
≥ 0.1
≥ 0.68
≥ 0.63
M2 0.4 3.82 – 4
3.7 – 4
≥ 4.32
≥ 4.18
1.4
1.275 – 1.525
1.4
1.2 – 1.6
≥ 3.07
≥ 2.95
≤ 2.6
0.1 – 0.25
0.4 – 1.2
≥ 0.1
≥ 0.89
≥ 0.84
M2.5 0.45 4.82 – 5
4.7 – 5
≥ 5.45
≥ 5.31
1.7
1.575 – 1.825
1.7
1.5 – 1.9
≥ 4.07
≥ 3.95
≤ 3.1
0.1 – 0.25
0.45 – 1.35
≥ 0.1
≥ 1.1
≥ 1.05
M3 0.5 5.32 – 5.5
5.2 – 5.5
≥ 6.01
≥ 5.88
2
1.875 – 2.125
2
1.8 – 2.2
≥ 4.57
≥ 4.45
≤ 3.6
0.15 – 0.4
0.5 – 1.5
≥ 0.1
≥ 1.31
≥ 1.26
M3.5 0.6 5.82 – 6
5.7 – 6
≥ 6.58
≥ 6.44
2.4
2.275 – 2.525
2.4
2.2 – 2.6
≥ 5.07
≥ 4.95
≤ 4.1
0.15 – 0.4
0.6 – 1.8
≥ 0.1
≥ 1.59
≥ 1.54
M4 0.7 6.78 – 7
6.64 – 7
≥ 7.66
≥ 7.5
2.8
2.675 – 2.925
2.8
2.6 – 3
≥ 5.88
≥ 5.74
≤ 4.7
0.15 – 0.4
0.7 – 2.1
≥ 0.2
≥ 1.87
≥ 1.82
M5 0.8 7.78 – 8
7.64 – 8
≥ 8.79
≥ 8.63
3.5
3.35 – 3.65
3.5
3.26 – 3.74
≥ 6.88
≥ 6.74
≤ 5.7
0.15 – 0.5
0.8 – 2.4
≥ 0.2
≥ 2.35
≥ 2.28
M6 1 9.78 – 10
9.64 – 10
≥ 11.05
≥ 10.89
4
3.85 – 4.15
4
3.76 – 4.24
≥ 8.88
≥ 8.74
≤ 6.8
0.15 – 0.5
1 – 3
≥ 0.25
≥ 2.7
≥ 2.63
M8 1.25 12.73 – 13
12.57 – 13
≥ 14.38
≥ 14.2
5.3
5.15 – 5.45
5.3
5.06 – 5.54
≥ 11.63
≥ 11.47
≤ 9.2
0.15 – 0.6
1.25 – 4
≥ 0.4
≥ 3.61
≥ 3.54
M10 1.5 15.73 – 16
DIN 17
15.57 – 16
DIN 17
≥ 17.77
≥ 17.59
6.4
6.22 – 6.58
6.4
6.11 – 6.69
≥ 14.63
≥ 14.47
≤ 11.2
0.15 – 0.6
1.5 – 4.5
≥ 0.4
≥ 4.35
≥ 4.28
M12 1.75 17.73 – 18
DIN 19
17.57 – 18
DIN 19
≥ 20.03
≥ 19.85
7.5
7.32 – 7.68
7.5
7.21 – 7.79
≥ 16.63
≥ 16.47
≤ 13.7
0.15 – 0.6
1.75 – 5.3
≥ 0.6
≥ 5.12
≥ 5.05
M14 2 20.67 – 21
DIN 22
20.16 – 21
DIN 22
≥ 23.36
≥ 22.78
8.8
8.62 – 8.98
8.8
8.51 – 9.09
≥ 19.64
≥ 19.15
≤ 15.7
0.15 – 0.6
2 – 6
≥ 0.6
≥ 6.03
≥ 5.96
M16 2 23.67 – 24
23.16 – 24
≥ 26.75
≥ 26.17
10
9.82 – 10.18
10
9.71 – 10.29
≥ 22.49
≥ 22
≤ 17.7
0.2 – 0.8
2 – 6
≥ 0.6
≥ 6.87
≥ 6.8
M18 2.5 26.67 – 27
26.16 – 27
≥ 30.14
≥ 29.56
11.5
11.285 – 11.715
11.5
11.15 – 11.85
≥ 25.34
≥ 24.85
≤ 20.2
0.2 – 0.8
2.5 – 7.5
≥ 0.6
≥ 7.9
≥ 7.81
M20 2.5 29.67 – 30
29.16 – 30
≥ 33.53
≥ 32.95
12.5
12.285 – 12.715
12.5
12.15 – 12.85
≥ 28.19
≥ 27.7
≤ 22.4
0.2 – 0.8
2.5 – 7.5
≥ 0.8
≥ 8.6
≥ 8.51
M22 2.5 33.38 – 34
DIN 32
33 – 34
DIN 32
≥ 37.72
≥ 37.29
14
13.785 – 14.215
14
13.65 – 14.35
≥ 31.71
≥ 31.35
≤ 24.4
0.2 – 0.8
2.5 – 7.5
≥ 0.8
≥ 9.65
≥ 9.56
M24 3 35.38 – 36
35 – 36
≥ 39.98
≥ 39.55
15
14.785 – 15.215
15
14.65 – 15.35
≥ 33.61
≥ 33.25
≤ 26.4
0.2 – 0.8
3 – 9
≥ 0.8
≥ 10.35
≥ 10.26
M27 3 ≤ 41
40 – 41
—
≥ 45.2
17
17
16.65 – 17.35
—
≥ 38
≤ 30.4
0.2 – 0.8
3 – 9
≥ 1
—
≥ 11.66
M30 3.5 ≤ 46
45 – 46
—
≥ 50.85
18.7
18.7
18.28 – 19.12
—
≥ 42.75
≤ 33.4
0.2 – 0.8
3.5 – 10.5
≥ 1
—
≥ 12.8
M33 3.5 ≤ 50
49 – 50
—
≥ 55.37
21
21
20.58 – 21.42
—
≥ 46.55
≤ 36.4
0.2 – 0.8
3.5 – 10.5
≥ 1
—
≥ 14.41
M36 4 ≤ 55
53.8 – 55
—
≥ 60.79
22.5
22.5
22.08 – 22.95
—
≥ 51.11
≤ 39.4
0.2 – 0.8
4 – 12
≥ 1
—
≥ 15.46
M39 4 ≤ 60
58.8 – 60
—
≥ 66.44
25
25
24.58 – 25.42
—
≥ 55.86
≤ 42.4
0.3 – 1
4 – 12
≥ 1
—
≥ 17.21
M42 4.5 ≤ 65
63.1 – 65
—
≥ 71.3
26
26
25.58 – 26.42
—
≥ 59.95
≤ 45.6
0.3 – 1
4.5 – 13.5
≥ 1.2
—
≥ 17.91
M45 4.5 ≤ 70
68.1 – 70
—
≥ 76.95
28
28
27.58 – 28.42
—
≥ 64.7
≤ 48.6
0.3 – 1
4.5 – 13.5
≥ 1.2
—
≥ 19.31
M48 5 ≤ 75
73.1 – 75
—
≥ 82.6
30
30
29.58 – 30.42
—
≥ 69.45
≤ 52.6
0.3 – 1
5 – 15
≥ 1.6
—
≥ 20.71
M52 5 ≤ 80
78.1 – 80
—
≥ 88.25
33
33
32.5 – 33.5
—
≥ 74.2
≤ 56.6
0.3 – 1
5 – 15
≥ 1.6
—
≥ 22.75
M56 5.5 ≤ 85
82.8 – 85
—
≥ 93.56
35
35
34.5 – 35.5
—
≥ 78.66
≤ 63
0.3 – 1
5.5 – 16.5
≥ 2
—
≥ 24.15
M60 5.5 ≤ 90
87.8 – 90
—
≥ 99.21
38
38
37.5 – 38.5
—
≥ 83.41
≤ 67
0.3 – 1
5.5 – 16.5
≥ 2
—
≥ 26.25
M64 6 ≤ 95
92.8 – 95
—
≥ 104.86
40
40
39.5 – 40.5
—
≥ 88.16
≤ 71
0.3 – 1
6 – 18
≥ 2
—
≥ 27.65
Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet. Cells marked DIN show where DIN 933 used a different value.
Length tolerances 2 1.8 – 2.2
3 2.8 – 3.2
4 3.76 – 4.24
5 4.76 – 5.24
6 5.76 – 6.24
8 7.71 – 8.29
10 9.71 – 10.29
12 11.65 – 12.35
16 15.65 – 16.35
20 19.58 – 20.42
25 24.58 – 25.42
30 29.58 – 30.42
35 34.5 – 35.5
40 39.5 – 40.5
45 44.5 – 45.5
50 49.5 – 50.5
55 54.4 – 55.6
60 59.4 – 60.6
65 64.4 – 65.6
70 69.4 – 70.6
80 79.4 – 80.6
90 89.3 – 90.7
100 99.3 – 100.7
110 109.3 – 110.7
120 119.3 – 120.7
130 129.2 – 130.8
140 139.2 – 140.8
150 149.2 – 150.8
Size sheet · ISO 4017
M1.6
s width across flats 3.02 – 3.2
s width across flats 2.9 – 3.2
e width across corners ≥ 3.41
e width across corners ≥ 3.28
k head height 1.1
k head height 1.1
dw bearing face diameter ≥ 2.27
dw bearing face diameter ≥ 2.3
da transition diameter ≤ 2
c thickness of the mounting collar 0.1 – 0.25
a length undercut 0.35 – 1.05
r fillet radius ≥ 0.1
kwb ≥ 0.68
kwb ≥ 0.63 Thread · ISO 261/262
Pitch P 0.35
d2 1.373
d3 1.171
Tap drill 1.25
Stress area As 1.27 mm² Size sheet · ISO 4017
M2
s width across flats 3.82 – 4
s width across flats 3.7 – 4
e width across corners ≥ 4.32
e width across corners ≥ 4.18
k head height 1.4
k head height 1.4
dw bearing face diameter ≥ 3.07
dw bearing face diameter ≥ 2.95
da transition diameter ≤ 2.6
c thickness of the mounting collar 0.1 – 0.25
a length undercut 0.4 – 1.2
r fillet radius ≥ 0.1
kwb ≥ 0.89
kwb ≥ 0.84 Thread · ISO 261/262
Pitch P 0.4
d2 1.74
d3 1.509
Tap drill 1.6
Stress area As 2.07 mm² Size sheet · ISO 4017
M2.5
s width across flats 4.82 – 5
s width across flats 4.7 – 5
e width across corners ≥ 5.45
e width across corners ≥ 5.31
k head height 1.7
k head height 1.7
dw bearing face diameter ≥ 4.07
dw bearing face diameter ≥ 3.95
da transition diameter ≤ 3.1
c thickness of the mounting collar 0.1 – 0.25
a length undercut 0.45 – 1.35
r fillet radius ≥ 0.1
kwb ≥ 1.1
kwb ≥ 1.05 Thread · ISO 261/262
Pitch P 0.45
d2 2.208
d3 1.948
Tap drill 2.05
Stress area As 3.39 mm² Size sheet · ISO 4017
M3
s width across flats 5.32 – 5.5
s width across flats 5.2 – 5.5
e width across corners ≥ 6.01
e width across corners ≥ 5.88
k head height 2
k head height 2
dw bearing face diameter ≥ 4.57
dw bearing face diameter ≥ 4.45
da transition diameter ≤ 3.6
c thickness of the mounting collar 0.15 – 0.4
a length undercut 0.5 – 1.5
r fillet radius ≥ 0.1
kwb ≥ 1.31
kwb ≥ 1.26 Thread · ISO 261/262
Pitch P 0.5
d2 2.675
d3 2.387
Tap drill 2.5
Stress area As 5.03 mm² Size sheet · ISO 4017
M3.5
s width across flats 5.82 – 6
s width across flats 5.7 – 6
e width across corners ≥ 6.58
e width across corners ≥ 6.44
k head height 2.4
k head height 2.4
dw bearing face diameter ≥ 5.07
dw bearing face diameter ≥ 4.95
da transition diameter ≤ 4.1
c thickness of the mounting collar 0.15 – 0.4
a length undercut 0.6 – 1.8
r fillet radius ≥ 0.1
kwb ≥ 1.59
kwb ≥ 1.54 Thread · ISO 261/262
Pitch P 0.6
d2 3.11
d3 2.764
Tap drill 2.9
Stress area As 6.78 mm² Size sheet · ISO 4017
M4
s width across flats 6.78 – 7
s width across flats 6.64 – 7
e width across corners ≥ 7.66
e width across corners ≥ 7.5
k head height 2.8
k head height 2.8
dw bearing face diameter ≥ 5.88
dw bearing face diameter ≥ 5.74
da transition diameter ≤ 4.7
c thickness of the mounting collar 0.15 – 0.4
a length undercut 0.7 – 2.1
r fillet radius ≥ 0.2
kwb ≥ 1.87
kwb ≥ 1.82 Thread · ISO 261/262
Pitch P 0.7
d2 3.545
d3 3.141
Tap drill 3.3
Stress area As 8.78 mm² Size sheet · ISO 4017
M5
s width across flats 7.78 – 8
s width across flats 7.64 – 8
e width across corners ≥ 8.79
e width across corners ≥ 8.63
k head height 3.5
k head height 3.5
dw bearing face diameter ≥ 6.88
dw bearing face diameter ≥ 6.74
da transition diameter ≤ 5.7
c thickness of the mounting collar 0.15 – 0.5
a length undercut 0.8 – 2.4
r fillet radius ≥ 0.2
kwb ≥ 2.35
kwb ≥ 2.28 Thread · ISO 261/262
Pitch P 0.8
d2 4.48
d3 4.019
Tap drill 4.2
Stress area As 14.18 mm² Size sheet · ISO 4017
M6
s width across flats 9.78 – 10
s width across flats 9.64 – 10
e width across corners ≥ 11.05
e width across corners ≥ 10.89
k head height 4
k head height 4
dw bearing face diameter ≥ 8.88
dw bearing face diameter ≥ 8.74
da transition diameter ≤ 6.8
c thickness of the mounting collar 0.15 – 0.5
a length undercut 1 – 3
r fillet radius ≥ 0.25
kwb ≥ 2.7
kwb ≥ 2.63 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Size sheet · ISO 4017
M8
s width across flats 12.73 – 13
s width across flats 12.57 – 13
e width across corners ≥ 14.38
e width across corners ≥ 14.2
k head height 5.3
k head height 5.3
dw bearing face diameter ≥ 11.63
dw bearing face diameter ≥ 11.47
da transition diameter ≤ 9.2
c thickness of the mounting collar 0.15 – 0.6
a length undercut 1.25 – 4
r fillet radius ≥ 0.4
kwb ≥ 3.61
kwb ≥ 3.54 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Size sheet · ISO 4017
M10
s width across flats 15.73 – 16
s width across flats 15.57 – 16
e width across corners ≥ 17.77
e width across corners ≥ 17.59
k head height 6.4
k head height 6.4
dw bearing face diameter ≥ 14.63
dw bearing face diameter ≥ 14.47
da transition diameter ≤ 11.2
c thickness of the mounting collar 0.15 – 0.6
a length undercut 1.5 – 4.5
r fillet radius ≥ 0.4
kwb ≥ 4.35
kwb ≥ 4.28 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Size sheet · ISO 4017
M12
s width across flats 17.73 – 18
s width across flats 17.57 – 18
e width across corners ≥ 20.03
e width across corners ≥ 19.85
k head height 7.5
k head height 7.5
dw bearing face diameter ≥ 16.63
dw bearing face diameter ≥ 16.47
da transition diameter ≤ 13.7
c thickness of the mounting collar 0.15 – 0.6
a length undercut 1.75 – 5.3
r fillet radius ≥ 0.6
kwb ≥ 5.12
kwb ≥ 5.05 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Size sheet · ISO 4017
M14
s width across flats 20.67 – 21
s width across flats 20.16 – 21
e width across corners ≥ 23.36
e width across corners ≥ 22.78
k head height 8.8
k head height 8.8
dw bearing face diameter ≥ 19.64
dw bearing face diameter ≥ 19.15
da transition diameter ≤ 15.7
c thickness of the mounting collar 0.15 – 0.6
a length undercut 2 – 6
r fillet radius ≥ 0.6
kwb ≥ 6.03
kwb ≥ 5.96 Thread · ISO 261/262
Pitch P 2
d2 12.701
d3 11.546
Tap drill 12
Stress area As 115.44 mm² Size sheet · ISO 4017
M16
s width across flats 23.67 – 24
s width across flats 23.16 – 24
e width across corners ≥ 26.75
e width across corners ≥ 26.17
k head height 10
k head height 10
dw bearing face diameter ≥ 22.49
dw bearing face diameter ≥ 22
da transition diameter ≤ 17.7
c thickness of the mounting collar 0.2 – 0.8
a length undercut 2 – 6
r fillet radius ≥ 0.6
kwb ≥ 6.87
kwb ≥ 6.8 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Size sheet · ISO 4017
M18
s width across flats 26.67 – 27
s width across flats 26.16 – 27
e width across corners ≥ 30.14
e width across corners ≥ 29.56
k head height 11.5
k head height 11.5
dw bearing face diameter ≥ 25.34
dw bearing face diameter ≥ 24.85
da transition diameter ≤ 20.2
c thickness of the mounting collar 0.2 – 0.8
a length undercut 2.5 – 7.5
r fillet radius ≥ 0.6
kwb ≥ 7.9
kwb ≥ 7.81 Thread · ISO 261/262
Pitch P 2.5
d2 16.376
d3 14.933
Tap drill 15.5
Stress area As 192.47 mm² Size sheet · ISO 4017
M20
s width across flats 29.67 – 30
s width across flats 29.16 – 30
e width across corners ≥ 33.53
e width across corners ≥ 32.95
k head height 12.5
k head height 12.5
dw bearing face diameter ≥ 28.19
dw bearing face diameter ≥ 27.7
da transition diameter ≤ 22.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 2.5 – 7.5
r fillet radius ≥ 0.8
kwb ≥ 8.6
kwb ≥ 8.51 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 mm² Size sheet · ISO 4017
M22
s width across flats 33.38 – 34
s width across flats 33 – 34
e width across corners ≥ 37.72
e width across corners ≥ 37.29
k head height 14
k head height 14
dw bearing face diameter ≥ 31.71
dw bearing face diameter ≥ 31.35
da transition diameter ≤ 24.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 2.5 – 7.5
r fillet radius ≥ 0.8
kwb ≥ 9.65
kwb ≥ 9.56 Thread · ISO 261/262
Pitch P 2.5
d2 20.376
d3 18.933
Tap drill 19.5
Stress area As 303.4 mm² Size sheet · ISO 4017
M24
s width across flats 35.38 – 36
s width across flats 35 – 36
e width across corners ≥ 39.98
e width across corners ≥ 39.55
k head height 15
k head height 15
dw bearing face diameter ≥ 33.61
dw bearing face diameter ≥ 33.25
da transition diameter ≤ 26.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 3 – 9
r fillet radius ≥ 0.8
kwb ≥ 10.35
kwb ≥ 10.26 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Size sheet · ISO 4017
M27
s width across flats ≤ 41
s width across flats 40 – 41
e width across corners ≥ 45.2
k head height 17
k head height 17
dw bearing face diameter ≥ 38
da transition diameter ≤ 30.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 3 – 9
r fillet radius ≥ 1
kwb ≥ 11.66 Thread · ISO 261/262
Pitch P 3
d2 25.051
d3 23.319
Tap drill 24
Stress area As 459.41 mm² Size sheet · ISO 4017
M30
s width across flats ≤ 46
s width across flats 45 – 46
e width across corners ≥ 50.85
k head height 18.7
k head height 18.7
dw bearing face diameter ≥ 42.75
da transition diameter ≤ 33.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 3.5 – 10.5
r fillet radius ≥ 1
kwb ≥ 12.8 Thread · ISO 261/262
Pitch P 3.5
d2 27.727
d3 25.706
Tap drill 26.5
Stress area As 560.59 mm² Size sheet · ISO 4017
M33
s width across flats ≤ 50
s width across flats 49 – 50
e width across corners ≥ 55.37
k head height 21
k head height 21
dw bearing face diameter ≥ 46.55
da transition diameter ≤ 36.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 3.5 – 10.5
r fillet radius ≥ 1
kwb ≥ 14.41 Thread · ISO 261/262
Pitch P 3.5
d2 30.727
d3 28.706
Tap drill 29.5
Stress area As 693.55 mm² Size sheet · ISO 4017
M36
s width across flats ≤ 55
s width across flats 53.8 – 55
e width across corners ≥ 60.79
k head height 22.5
k head height 22.5
dw bearing face diameter ≥ 51.11
da transition diameter ≤ 39.4
c thickness of the mounting collar 0.2 – 0.8
a length undercut 4 – 12
r fillet radius ≥ 1
kwb ≥ 15.46 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 mm² Size sheet · ISO 4017
M39
s width across flats ≤ 60
s width across flats 58.8 – 60
e width across corners ≥ 66.44
k head height 25
k head height 25
dw bearing face diameter ≥ 55.86
da transition diameter ≤ 42.4
c thickness of the mounting collar 0.3 – 1
a length undercut 4 – 12
r fillet radius ≥ 1
kwb ≥ 17.21 Thread · ISO 261/262
Pitch P 4
d2 36.402
d3 34.093
Tap drill 35
Stress area As 975.75 mm² Size sheet · ISO 4017
M42
s width across flats ≤ 65
s width across flats 63.1 – 65
e width across corners ≥ 71.3
k head height 26
k head height 26
dw bearing face diameter ≥ 59.95
da transition diameter ≤ 45.6
c thickness of the mounting collar 0.3 – 1
a length undercut 4.5 – 13.5
r fillet radius ≥ 1.2
kwb ≥ 17.91 Thread · ISO 261/262
Pitch P 4.5
d2 39.077
d3 36.479
Tap drill 37.5
Stress area As 1120.91 mm² Size sheet · ISO 4017
M45
s width across flats ≤ 70
s width across flats 68.1 – 70
e width across corners ≥ 76.95
k head height 28
k head height 28
dw bearing face diameter ≥ 64.7
da transition diameter ≤ 48.6
c thickness of the mounting collar 0.3 – 1
a length undercut 4.5 – 13.5
r fillet radius ≥ 1.2
kwb ≥ 19.31 Thread · ISO 261/262
Pitch P 4.5
d2 42.077
d3 39.479
Tap drill 40.5
Stress area As 1306 mm² Size sheet · ISO 4017
M48
s width across flats ≤ 75
s width across flats 73.1 – 75
e width across corners ≥ 82.6
k head height 30
k head height 30
dw bearing face diameter ≥ 69.45
da transition diameter ≤ 52.6
c thickness of the mounting collar 0.3 – 1
a length undercut 5 – 15
r fillet radius ≥ 1.6
kwb ≥ 20.71 Thread · ISO 261/262
Pitch P 5
d2 44.752
d3 41.866
Tap drill 43
Stress area As 1473.15 mm² Size sheet · ISO 4017
M52
s width across flats ≤ 80
s width across flats 78.1 – 80
e width across corners ≥ 88.25
k head height 33
k head height 33
dw bearing face diameter ≥ 74.2
da transition diameter ≤ 56.6
c thickness of the mounting collar 0.3 – 1
a length undercut 5 – 15
r fillet radius ≥ 1.6
kwb ≥ 22.75 Thread · ISO 261/262
Pitch P 5
d2 48.752
d3 45.866
Tap drill 47
Stress area As 1757.83 mm² Size sheet · ISO 4017
M56
s width across flats ≤ 85
s width across flats 82.8 – 85
e width across corners ≥ 93.56
k head height 35
k head height 35
dw bearing face diameter ≥ 78.66
da transition diameter ≤ 63
c thickness of the mounting collar 0.3 – 1
a length undercut 5.5 – 16.5
r fillet radius ≥ 2
kwb ≥ 24.15 Thread · ISO 261/262
Pitch P 5.5
d2 52.428
d3 49.252
Tap drill 50.5
Stress area As 2030.02 mm² Size sheet · ISO 4017
M60
s width across flats ≤ 90
s width across flats 87.8 – 90
e width across corners ≥ 99.21
k head height 38
k head height 38
dw bearing face diameter ≥ 83.41
da transition diameter ≤ 67
c thickness of the mounting collar 0.3 – 1
a length undercut 5.5 – 16.5
r fillet radius ≥ 2
kwb ≥ 26.25 Thread · ISO 261/262
Pitch P 5.5
d2 56.428
d3 53.252
Tap drill 54.5
Stress area As 2362.02 mm² Size sheet · ISO 4017
M64
s width across flats ≤ 95
s width across flats 92.8 – 95
e width across corners ≥ 104.86
k head height 40
k head height 40
dw bearing face diameter ≥ 88.16
da transition diameter ≤ 71
c thickness of the mounting collar 0.3 – 1
a length undercut 6 – 18
r fillet radius ≥ 2
kwb ≥ 27.65 Thread · ISO 261/262
Pitch P 6
d2 60.103
d3 56.639
Tap drill 58
Stress area As 2675.97 mm² Provenance
Reviewed — dimensions cross-checked against the official ISO preview; values match.
Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (2) Dimensions cross-checked against the official ISO 4017:2022 preview — values match. The source publishes one identical table for DIN 933, ISO 4017.