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Torque ( - A.90.A.10)
IMPORTANT: When replacing cap screws, always use a cap screw of the same measurement and strength as
the cap screw being replaced.
Metric cap screws and nuts are identified by the grade number stamped on the head of the cap screw or on the
surface of the nuts. U.S. customary cap screws are identified by radial lines stamped on the head of the cap screw.
Cap screw marking and torque value – Metric
rh04h178
Dia.
Cast iron
mm
Nm
ft lb
6
9
5
7
14
9
8
23
17
10
45
33
12
80
60
14
125
90
16
195
140
18
280
200
20
400
290
NOTES
1.
Always use the torque values listed in the above table when specific torque values are not supplied in a
procedure.
2.
Do NOT use these torque values in place of specified torque values in a procedure.
3.
The values in the table are based on lubricated threads.
Commercial steel class
8.8
Cap screw head marking
1
Aluminum
Cast iron
Nm
ft lb
Nm
7
4
13
7
11
18
18
14
33
30
25
65
55
40
115
90
65
180
140
100
280
180
135
390
–
–
550
INTRODUCTION
10.9
2
rh04h179
Aluminum
ft lb
Nm
10
7
4
7
14
11
25
18
14
50
30
25
85
55
40
133
90
65
200
140
100
285
180
135
–
–
400
87515682 4 18/01/2006
14
12.9
rh04h180
Cast iron
ft lb
Nm
ft lb
14
9
23
18
40
29
70
50
125
95
195
145
290
210
400
290
–
–
3
Aluminum
Nm
ft lb
7
4
7
11
18
14
30
25
55
40
90
65
140
100
180
135
–
–
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