All information, illustrations and specifications in this manual are based on the latest information
available at the time of publication. We reserve the right to make changes at any time without notice.
62
10.0. Specification
10.2. Metric bolt and cap screw torque values
Property
Class and
Head
Markings
Property
Class and
Nut
Markings
Size
class 4.8
class 8.8 or 9.8
class 10.9
class 12.9
Dry **
Lubricated *
Dry **
Lubricated *
Dry **
Lubricated *
Dry **
Lubricated *
N-m
lb-ft
N-m
lb-ft
N-m
lb-ft
N-m
lb-ft
N-m
lb-ft
N-m
lb-ft
N-m
lb-ft
N-m
lb-ft
M6
4,8
3,5
6
4,5
9
6,5
11
8,5
13
9,5
17
12
15
11,5
19
14,5
M8
12
8,5
15
11
22
16
28
20
32
24
40
30
37
28
47
35
M10
23
17
29
21
43
32
55
40
63
47
80
60
75
55
95
70
M12
40
29
50
37
75
55
95
70
110
80
140
105
130
95
165
120
M14
63
47
80
60
120
88
150
110
175
130
225
165
205
150
260
190
M16
100
73
125
92
190
140
240
175
275
200
350
255
320
240
400
300
M18
135
100
175
125
260
195
330
250
375
275
475
350
440
325
560
410
M20
190
140
240
180
375
275
475
350
530
400
675
500
625
460
800
580
M22
260
190
330
250
510
375
650
475
725
540
925
675
850
625
1075 800
M24
330
250
425
310
650
475
825
600
925
675
1150 850
1075 800
1350 1000
M27
490
360
625
450
950
700
1200 875
1350 1000 1700 1250 1600 1150 2000 1500
M30
675
490
850
625
1300 950
1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
M33
900
675
1150 850
1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
M36
1150 850
1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
DO NOT use these values if a different torque value or
tightening procedure is given for a specific application.
Torque values listed are for general use only. Check
tightness of fasteners periodically.
Shear bolts are designet to fail under predetermined
loads. Always replace shear bolt with identical property
class
Fasteners should be replaced with the same or higher
property class. If higher property class
fasteners used, these should only be tightened to the
strength of the original.
Make sure fasteners threads are clean and that you
properly start thread engagement. This will prevent
therm from failing when tightening.
Tighten plastic insert or crimped steel-type lock nuts
to approximately 50 percent of the dry torque shown
in the chart, applied to the nut, not to the bolt head.
Tighten toothed or serrated-type lock nuts to the full
torque value.
* “Lubricated“ means coated with a lubricant such as engine oil, or
fasteners with phossphate and oil coatings.
** “Dry“ means plain or zinc platend without any lubrication.
