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TORQUE TIGHTENING CHART
5
I
SAE FASTENER
TORQUE
CHART
iNOTE: Use these torques, unless special torques are specified. Values are for UNC and UNF thread fasteners, plated or unplated, as received from
supplier.Fastenerscan be dry or lubricatedwith normalengineoil. Valuesdo not apply if graphite,moly-disulphide or other extremepressure
lubricant is used.
SAE Grade No.
2
5
8*
Bolt head identification
0
OO@
G@@
(See Note 1)
Bolt Size
LB FT
Nm
LBFT
Nm
LB FT
Nm
Min.
Max.
Min.
Max.
'
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
1/4
5
6
7
8
9
11
12
15
12
15
16
20
5/16
10
12
14
16
17
20.5
23
28
24
29
33
39
3/8
20
23
27
31
35
42
48
57
45
54
61
73
7/16
30
35
41
47
54
64
73
87
70
84
95
114
1/2
45
52
61
70
80
96
109
130
110
132
149
179
9/16
65
75
88
102
110
132
149
179
160
192
216
260
5/8
95
105
129
142
150
180
203
244
220
264
298
358
3/4
150
185
203
251
270
324
366
439
380
456
515
618
7/8
160
200
217
271
400
480
542
651
600
720
814
976
1
250
300
339
406
580
696
787
944
900
1080
1220
1464
1 - 1/8
800
880
1085
1193
1280
1440
1736
1953
1 - 1/4
1120
1240
1519
1581
1820
2000
2468
2712
1 - 3/8
1450
1680
1980
2278
2380
2720
3227
3688
1
-
1/2
1940
2200
2631
2963
3160
3580
4285
4827
NOTE 1: Bolt head identification marks as per grade. Manufacturing marks will vary.
*Thick nuts must be used with Grade 8 bolts.
METRIC FASTENER (ISO) TORQUE CHART
NOTE: Use these torques,unlessspecialtorquesare specified.Valuesare for coursethreadfasteners,plated or unplated,as receivedfrom
supplier.Fastenerscan be dry or lubricatedwith normalengineoil. Valuesdo not apply if graphite,moly-disulphide or other extremepressure
lubricant is used.
ISO Class No.
8.8
10.9
12.9
Bolt head identification
G
@
@
(See Note 1)
Bolt Size
Nm
LB FT
Nm
LB FT
Nm
I
LB FT
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
I
Min.
Max.
M4
3
4
2
3
4
5
3
4
M5
6.5
8
5
6
9.5
11
7
8
Because of the low ductility of
M6
10.5
12
8
9
15
17.5
11
13
these fasteners,
the torque
M8
26
31
19
23
37
43
27
32
range
is to be determined
M10
52
61
38
45
73
67
54
64
individually for each application.
As a general rule, the torque
M12
90
107
55
79
125
150
93
112
ranges specified for grade 10.9
*M14
144
172
106
127
200
245
149
179
fasteners
can be used satis-
M16
217
271
150
200
310
380
610
730
factorily on 12.9 fasteners.
M20
434
515
320
380
610
730
450
540
M24
675
815
500
600
1050
1275
780
940
M30
1250
1500
920
1100
2000
2400
1470
1770
*M14 is not a preferred size.
M36
2175
2600
1600
1950
3500
4200
2580
3080
.-.JOTE 1: Bolt head identification marks as per grade. Manufacturing marks will vary.
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