Countersunk Screws Torque Table Metric, ISO

ANSI Engineering Hardware | Engineering Fastener Torque Specifications
ISO Metric Hard Engineering Data

Preloads and tightening torque for Metric ISO countersunk head steel screws with hexagon socket head or similar heads.

Typical values for countersunk heads screws with hexagon/hexalobular socket or associated nut, friction coefficient µ = 0.14, Fine thread and course threads apply

Per. DIN 7991 or ISO 10642 property classes 8.8 and 10.9.

Dimensions
Preloads Fv (kN) for property class
Tightening torque MA (Nm) for property class
8.8
10.9
8.8
10.9
M4
3.10
4.40
2.6
3.4
M5
5.10
7.30
5.6
6.7
M6
7.20
10.30
9.6

11.6

M8
13.20
18.90
23
28.3
M10
21.00
30.10
46
56.0
M12
30.70
43.90
81
96.8
M14
42.00
60.30
125
154.0
M16
58.00
82.70
195
239.0
M18
72.80
100.90
275
332.0
M20
93.60
129.40
390
468.0
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