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ISOCurrent✓ Reviewed · checked against the ISO table

ISO 14579

Hexalobular socket head cap screws

Head · drive
Cylindrical (cheese / socket cap) head · Hexalobular socket (Torx®)
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
SizePdsdkdknote cdknote dkbdwdarthexalobularAhexalobularlfrecess_nohexalobularvw
M20.4
1.86 – 2
≥ 3.62
≤ 3.8
≤ 3.98
1.86 – 2
(16)
≥ 3.48
≤ 2.6
≥ 0.1
0.71 – 0.84
(1.75)
≤ 0.51
6
≤ 0.2
≥ 0.55
M2.50.45
2.36 – 2.5
≥ 4.32
≤ 4.5
≤ 4.68
2.36 – 2.5
(17)
≥ 4.18
≤ 3.1
≥ 0.1
0.91 – 1.04
(2.4)
≤ 0.51
8
≤ 0.25
≥ 0.85
M30.5
2.86 – 3
≥ 5.32
≤ 5.5
≤ 5.68
2.86 – 3
(18)
≥ 5.07
≤ 3.6
≥ 0.1
1.01 – 1.27
(2.8)
≤ 0.51
10
≤ 0.3
≥ 1.15
M40.7
3.82 – 4
≥ 6.78
≤ 7
≤ 7.22
3.82 – 4
(20)
≥ 6.53
≤ 4.7
≥ 0.2
1.42 – 1.8
(3.95)
≤ 0.6
20
≤ 0.4
≥ 1.4
M50.8
4.82 – 5
≥ 8.28
≤ 8.5
≤ 8.72
4.82 – 5
(22)
≥ 8.03
≤ 5.7
≥ 0.2
1.65 – 2.03
(4.5)
≤ 0.6
25
≤ 0.5
≥ 1.9
M61
5.82 – 6
≥ 9.78
≤ 10
≤ 10.22
5.7 – 6
(24)
≥ 9.38
≤ 6.8
≥ 0.25
2.02 – 2.42
(5.6)
≤ 0.68
30
≤ 0.6
≥ 2.3
M81.25
7.78 – 8
≥ 12.73
≤ 13
≤ 13.27
7.64 – 8
(28)
≥ 12.33
≤ 9.2
≥ 0.4
2.92 – 3.31
(7.95)
≤ 1.02
45
≤ 0.8
≥ 3.3
M101.5
9.78 – 10
≥ 15.73
≤ 16
≤ 16.27
9.64 – 10
(32)
≥ 15.33
≤ 11.2
≥ 0.4
3.62 – 4.02
(8.95)
≤ 1.02
50
≤ 1
≥ 4
M121.75
11.73 – 12
≥ 17.73
≤ 18
≤ 18.27
11.57 – 12
(36)
≥ 17.23
≤ 13.7
≥ 0.6
4.82 – 5.21
(11.35)
≤ 1.45
55
≤ 1.2
≥ 4.8
M142
13.73 – 14
≥ 20.67
≤ 21
≤ 21.33
13.57 – 14
(40)
≥ 20.17
≤ 15.7
≥ 0.6
5.62 – 5.99
(13.45)
≤ 1.45
60
≤ 1.4
≥ 5.8
M162
15.73 – 16
≥ 23.67
≤ 24
≤ 24.33
15.57 – 16
(44)
≥ 23.17
≤ 17.7
≥ 0.6
6.62 – 7.01
(15.7)
≤ 1.45
70
≤ 1.6
≥ 6.8
M182.5
17.73 – 18
≥ 26.67
≤ 27
≤ 27.33
17.57 – 18
(48)
≥ 25.87
≤ 20.2
≥ 0.6
7.5 – 8
(17.75)
≤ 1.87
80
≤ 1.8
≥ 7.8
M202.5
19.67 – 20
≥ 29.67
≤ 30
≤ 30.33
19.48 – 20
(52)
≥ 28.87
≤ 22.4
≥ 0.8
8.69 – 9.2
(20.2)
≤ 2.04
90
≤ 2
≥ 8.6

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

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
200199.075 – 200.925

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