INTRODUCTION
Torque - Minimum tightening torques for normal assembly
METRIC NON-FLANGED HARDWARE
NOM. SIZE
CLASS 8.8 BOLT and CLASS 8 NUT
CLASS 10.9 BOLT and CLASS 10 NUT
UNPLATED
PLATED W/ZnCr
UNPLATED
PLATED W/ZnCr
M4
2.2 N·m
(
19 lb in
)
2.9 N·m
(
26 lb in
)
3.2 N·m
(
28 lb in
)
4.2 N·m
(
37 lb in
)
M5
4.5 N·m
(
40 lb in
)
5.9 N·m
(
52 lb in
)
6.4 N·m
(
57 lb in
)
8.5 N·m
(
75 lb in
)
M6
7.5 N·m
(
66 lb in
)
10 N·m
(
89 lb in
)
11 N·m
(
96 lb in
)
15 N·m
(
128 lb in
)
M8
18 N·m
(
163 lb in
)
25 N·m
(
217 lb in
)
26 N·m
(
234 lb in
)
35 N·m
(
311 lb in
)
M10
37 N·m
(
27 lb ft
)
49 N·m
(
36 lb ft
)
52 N·m
(
38 lb ft
)
70 N·m
(
51 lb ft
)
M12
64 N·m
(
47 lb ft
)
85 N·m
(
63 lb ft
)
91 N·m
(
67 lb ft
)
121 N·m
(
90 lb ft
)
M16
158 N·m
(
116 lb ft
)
210 N·m
(
155 lb ft
)
225 N·m
(
166 lb ft
)
301 N·m
(
222 lb ft
)
M20
319 N·m
(
235 lb ft
)
425 N·m
(
313 lb ft
)
440 N·m
(
325 lb ft
)
587 N·m
(
433 lb ft
)
M24
551 N·m
(
410 lb ft
)
735 N·m
(
500 lb ft
)
762 N·m
(
560 lb ft
)
1016 N·m
(
750 lb ft
)
NOTE:
M4 through M8 hardware torque specifications are shown in pound-inches. M10 through M24 hardware torque
specifications are shown in pound-feet.
NOTE:
Torque locknuts
10 %
above standard hardware torque value.
47477424 19/03/2013
8
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