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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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