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ISOCurrent✓ Reviewed · checked against the ISO table

ISO 4762

Hexagon socket head cap screws

Replaces
DIN 912
National equivalents
CSN 021143 · PN 82302 · UNI 5931
Head · drive
Cylindrical (cheese / socket cap) head · Hexagon socket (Allen)
Thread
Metric ISO coarse thread
Tolerance
6g, 5g6g for strength 12.9
Property classes
8.810.912.9A2A4
Materials
SteelStainless

Dimensions

mm · values as the standard states them
SizePdsdkdkknurled headsekhbdwdartvw
M1.60.35
1.46 – 1.6
2.86 – 3
≤ 3.14
1.5
1.52 – 1.58
≥ 1.733
1.46 – 1.6
≤ 0.34
15
≥ 2.72
≤ 2
≥ 0.1
≥ 0.7
≤ 0.16
≥ 0.55
M20.4
1.86 – 2
3.62 – 3.8
≤ 3.98
1.5
1.52 – 1.58
≥ 1.733
1.86 – 2
≤ 0.51
16
≥ 3.48
≤ 2.6
≥ 0.1
≥ 1
≤ 0.2
≥ 0.55
M2.50.45
2.36 – 2.5
4.32 – 4.5
≤ 4.68
2
2.02 – 2.08
≥ 2.303
2.36 – 2.5
≤ 0.51
17
≥ 4.18
≤ 3.1
≥ 0.1
≥ 1.1
≤ 0.25
≥ 0.85
M30.5
2.86 – 3
5.32 – 5.5
≤ 5.68
2.5
2.52 – 2.58
≥ 2.873
2.86 – 3
≤ 0.51
18
≥ 5.07
≤ 3.6
≥ 0.1
≥ 1.3
≤ 0.3
≥ 1.15
M40.7
3.82 – 4
6.78 – 7
≤ 7.22
3
3.02 – 3.08
≥ 3.443
3.82 – 4
≤ 0.6
20
≥ 6.53
≤ 4.7
≥ 0.2
≥ 2
≤ 0.4
≥ 1.4
M50.8
4.82 – 5
8.28 – 8.5
≤ 8.72
4
4.02 – 4.095
≥ 4.583
4.82 – 5
≤ 0.6
22
≥ 8.03
≤ 5.7
≥ 0.2
≥ 2.5
≤ 0.5
≥ 1.9
M61
5.82 – 6
9.78 – 10
≤ 10.22
5
5.02 – 5.14
≥ 5.723
5.7 – 6
≤ 0.68
24
≥ 9.38
≤ 6.8
≥ 0.25
≥ 3
≤ 0.6
≥ 2.3
M81.25
7.78 – 8
12.73 – 13
≤ 13.27
6
6.02 – 6.14
≥ 6.863
7.64 – 8
≤ 1.02
28
≥ 12.33
≤ 9.2
≥ 0.4
≥ 4
≤ 0.8
≥ 3.3
M101.5
9.78 – 10
15.73 – 16
≤ 16.27
8
8.025 – 8.175
≥ 9.149
9.64 – 10
≤ 1.02
32
≥ 15.33
≤ 11.2
≥ 0.4
≥ 5
≤ 1
≥ 4
M121.75
11.73 – 12
17.73 – 18
≤ 18.27
10
10.025 – 10.175
≥ 11.429
11.57 – 12
≤ 1.45
36
≥ 17.23
≤ 13.7
≥ 0.6
≥ 6
≤ 1.2
≥ 4.8
(M14)2
13.73 – 14
20.67 – 21
≤ 21.33
12
12.032 – 12.212
≥ 13.716
13.57 – 14
≤ 1.45
40
≥ 20.17
≤ 15.7
≥ 0.6
≥ 7
≤ 1.4
≥ 5.8
M162
15.73 – 16
23.67 – 24
≤ 24.33
14
14.032 – 14.212
≥ 15.996
15.57 – 16
≤ 1.45
44
≥ 23.17
≤ 17.7
≥ 0.6
≥ 8
≤ 1.6
≥ 6.8
M202.5
19.67 – 20
29.67 – 30
≤ 30.33
17
17.05 – 17.23
≥ 19.437
19.48 – 20
≤ 2.04
52
≥ 28.87
≤ 22.4
≥ 0.8
≥ 10
≤ 2
≥ 8.6
M243
23.67 – 24
35.61 – 36
≤ 36.39
19
19.065 – 19.275
≥ 21.734
23.48 – 24
≤ 2.04
60
≥ 34.81
≤ 26.4
≥ 0.8
≥ 12
≤ 2.4
≥ 10.4
M303.5
29.67 – 30
44.61 – 45
≤ 45.39
22
22.065 – 22.275
≥ 25.154
29.48 – 30
≤ 2.89
72
≥ 43.61
≤ 33.4
≥ 1
≥ 15.5
≤ 3
≥ 13.1
M364
35.61 – 36
53.54 – 54
≤ 54.46
27
27.065 – 27.275
≥ 30.854
35.38 – 36
≤ 2.89
84
≥ 52.54
≤ 39.4
≥ 1
≥ 19
≤ 3.6
≥ 15.3
M424.5
41.61 – 42
62.54 – 63
≤ 63.46
32
32.08 – 32.33
≥ 36.571
41.38 – 42
≤ 3.06
96
≥ 61.34
≤ 45.6
≥ 1.2
≥ 24
≤ 4.2
≥ 16.3
M485
47.61 – 48
71.54 – 72
≤ 72.46
36
36.08 – 36.33
≥ 41.131
47.38 – 48
≤ 3.91
108
≥ 70.34
≤ 52.6
≥ 1.6
≥ 28
≤ 4.8
≥ 17.5
M565.5
55.54 – 56
83.46 – 84
≤ 84.54
41
41.08 – 41.33
≥ 46.831
55.26 – 56
≤ 5.95
124
≥ 82.26
≤ 63
≥ 2
≥ 34
≤ 5.6
≥ 19
M646
63.54 – 64
95.46 – 96
≤ 96.54
46
46.08 – 46.33
≥ 52.531
63.26 – 64
≤ 5.95
140
≥ 94.26
≤ 71
≥ 2
≥ 38
≤ 6.4
≥ 22

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.

Length tolerances

2.52.3 – 2.7
32.8 – 3.2
43.76 – 4.24
54.76 – 5.24
65.76 – 6.24
87.71 – 8.29
109.71 – 10.29
1211.65 – 12.35
1615.65 – 16.35
2019.58 – 20.42
2524.58 – 25.42
3029.58 – 30.42
3534.5 – 35.5
4039.5 – 40.5
4544.5 – 45.5
5049.5 – 50.5
5554.4 – 55.6
6059.4 – 60.6
6564.4 – 65.6
7069.4 – 70.6
8079.4 – 80.6
9089.3 – 90.7
10099.3 – 100.7
110109.3 – 110.7
120119.3 – 120.7
130129.2 – 130.8
140139.2 – 140.8
150149.2 – 150.8
160159.2 – 160.8
180179.2 – 180.8
200199.07 – 200.92
220219.07 – 220.92
240239.07 – 240.92
260258.95 – 261.05
280278.95 – 281.05
300298.95 – 301.05

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