All information, illustrations and specifications in these Operating Instructions are based on the latest information available at the time of
publication. We reserve the right to make design changes at any time without prior notification
45
9.0. Technical Specifications
9.4. METRIC BOLT AND CAP SCREW TORQUE VALUES
Property
Class
and Head
Markings
Property
Class
and Nut
Markings
Größe
class 4.8
class 8.8 or 9.8
class 10.9
class 12.9
Lubricated *
Dry **
Lubricated *
Dry **
Lubricated *
Dry **
Lubricated *
Dry **
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.
