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ISOCurrent✓ Reviewed · checked against the ISO table

ISO 4016

Hexagon head bolts, product grade C

Replaces
DIN 601— not identical, 4 sizes differ
National equivalents
CSN 021301 · EU 24016
Head · drive
Hexagon head · External hexagon (spanner)
Thread
Metric ISO coarse thread, partial
Tolerance
6g
Materials
Steel

Dimensions

mm · values as the standard states them
SizePdssekb125 < l ≤ 200bl > 200bl ≤ 125dwdacrkw
M50.8
4.52 – 5.48
8
7.64 – 8
≥ 8.63
3.5
3.125 – 3.875
22
35
16
≥ 6.74
≤ 6
≤ 0.5
≥ 0.2
≥ 2.19
M61
5.52 – 6.48
10
9.64 – 10
≥ 10.89
4
3.625 – 4.375
24
37
18
≥ 8.74
≤ 7.2
≤ 0.5
≥ 0.25
≥ 2.54
M81.25
7.42 – 8.58
13
12.57 – 13
≥ 14.2
5.3
4.925 – 5.675
28
41
22
≥ 11.47
≤ 10.2
≤ 0.6
≥ 0.4
≥ 3.45
M101.5
9.42 – 10.58
16
15.57 – 16
DIN 17
≥ 17.59
6.4
5.95 – 6.85
32
45
26
≥ 14.47
≤ 12.2
≤ 0.6
≥ 0.4
≥ 4.17
M121.75
11.3 – 12.7
18
17.57 – 18
DIN 19
≥ 19.85
7.5
7.05 – 7.95
36
49
30
≥ 16.47
≤ 14.7
≤ 0.6
≥ 0.6
≥ 4.94
M142
13.3 – 14.7
21
20.16 – 21
DIN 22
≥ 22.78
8.8
8.35 – 9.25
40
53
34
≥ 19.15
≤ 16.7
≤ 0.6
≥ 0.6
≥ 5.85
M162
15.3 – 16.7
24
23.16 – 24
≥ 26.17
10
9.25 – 10.75
44
57
38
≥ 22
≤ 18.7
≤ 0.8
≥ 0.6
≥ 6.48
M182.5
17.3 – 18.7
27
26.16 – 27
≥ 29.56
11.5
10.6 – 12.4
48
61
42
≥ 24.85
≤ 21.2
≤ 0.8
≥ 0.6
≥ 7.42
M202.5
19.16 – 20.84
30
29.16 – 30
≥ 32.95
12.5
11.6 – 13.4
52
65
46
≥ 27.7
≤ 24.4
≤ 0.8
≥ 0.8
≥ 8.12
M222.5
21.16 – 22.84
34
33 – 34
DIN 32
≥ 37.29
14
13.1 – 14.9
56
69
50
≥ 31.35
≤ 26.4
≤ 0.8
≥ 0.8
≥ 9.17
M243
23.16 – 24.84
36
35 – 36
≥ 39.55
15
14.1 – 15.9
60
73
54
≥ 33.25
≤ 28.4
≤ 0.8
≥ 0.8
≥ 9.87
M273
26.16 – 27.84
41
40 – 41
≥ 45.2
17
16.1 – 17.9
66
79
60
≥ 38
≤ 32.4
≤ 0.8
≥ 1
≥ 11.27
M303.5
29.16 – 30.84
46
45 – 46
≥ 50.85
18.7
17.65 – 19.75
72
85
66
≥ 42.75
≤ 35.4
≤ 0.8
≥ 1
≥ 12.36
M333.5
32 – 34
50
49 – 50
≥ 55.37
21
19.95 – 22.05
78
91
—
≥ 46.55
≤ 38.4
≤ 0.8
≥ 1
≥ 13.97
M364
35 – 37
55
53.8 – 55
≥ 60.79
22.5
21.45 – 23.55
84
97
—
≥ 51.11
≤ 42.4
≤ 0.8
≥ 1
≥ 15.02
M394
38 – 40
60
58.8 – 60
≥ 66.44
25
23.95 – 26.05
90
103
—
≥ 55.86
≤ 45.4
≤ 1
≥ 1
≥ 16.77
M424.5
41 – 43
65
63.1 – 65
≥ 71.3
26
24.95 – 27.05
96
109
—
≥ 59.95
≤ 48.6
≤ 1
≥ 1.2
≥ 17.47
M454.5
44 – 46
70
68.1 – 70
≥ 76.95
28
26.95 – 29.05
102
115
—
≥ 64.7
≤ 52.6
≤ 1
≥ 1.2
≥ 18.87
M485
47 – 49
75
73.1 – 75
≥ 82.6
30
28.95 – 31.05
108
121
—
≥ 69.45
≤ 56.6
≤ 1
≥ 1.6
≥ 20.27
M525
50.8 – 53.2
80
78.1 – 80
≥ 88.25
33
31.75 – 34.25
116
129
—
≥ 74.2
≤ 62.6
≤ 1
≥ 1.6
≥ 22.23
M565.5
54.8 – 57.2
85
82.8 – 85
≥ 93.56
35
33.75 – 36.25
—
137
—
≥ 78.66
≤ 67
≤ 1
≥ 2
≥ 23.63
M605.5
58.8 – 61.2
90
87.8 – 90
≥ 99.21
38
36.75 – 39.25
—
145
—
≥ 83.41
≤ 71
≤ 1
≥ 2
≥ 25.73
M646
62.8 – 65.2
95
92.8 – 95
≥ 104.86
40
38.75 – 41.25
—
153
—
≥ 88.16
≤ 75
≤ 1
≥ 2
≥ 27.13

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 601 used a different value.

Length tolerances

2523.95 – 26.05
3028.95 – 31.05
3533.75 – 36.25
4038.75 – 41.25
4543.75 – 46.25
5048.75 – 51.25
5553.5 – 56.5
6058.5 – 61.5
6563.5 – 66.5
7068.5 – 71.5
8078.5 – 81.5
9088.25 – 91.75
10098.25 – 101.75
110108.25 – 111.75
120118.25 – 121.75
130128 – 132
140138 – 142
150148 – 152
160156 – 164
180176 – 184
200195.4 – 204.6
220215.4 – 224.6
240235.4 – 244.6
260254.8 – 265.2
280274.8 – 285.2
300294.8 – 305.2
320314.3 – 325.7
340334.3 – 345.7
360354.3 – 365.7
380374.3 – 385.7
400394.3 – 405.7
420413.7 – 426.3
440433.7 – 446.3
460453.7 – 466.3
480473.7 – 486.3
500493.7 – 506.3

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