TORQUE TIGHTENING CHART
SAE Grade No.
Bolt head identificati
cation (see note 1)
LB FT Nm LB FT 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 88 102 110 132 149 179 160 192 217 260
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
11/8 800 880 1085 1193 1280 1440 1736 1953
11/4 1120 1240 1519 1681 1820 2000 2468 2712
13/8 1460 1680 1980 2278 2380 2720 3227 3688
Note
NoteNote
Note :
::
: Use these torques, unless special torques are specified. Values are for UNF thread fasteners, plasted
or unplated as received from supplier. Fasteners can be dry or lubricated with normal engine oil. Values do
not apply if graphite, moly-disulphide or other extreme pressure lubricant is used.
2 5 8*
Bolt size
8.8 10.9
12.9
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11/2 1940 2200 2631 2983 3160 3560 4285 4827
ISO Class No.
Bolt head
identification(see
note1)
Nm LB FT Nm LB FT Nm LB FT
Min Max Min Max Min Max Min Max Min Max Min Max
M4 3 4 2 3 4 5 3 4
M5 6.5 8 5 6 9.5 11 7 8
M6 10.5 12 8 9 15 17.5 11 13
M8 26 31 19 23 37 43 27 32
M10 52 61 38 45 73 87 54 64
M12 90 107 66 79 125 150 93 112
*M14 144 172 106 127 200 245 149 179
M16 217 271 160 200 310 380 230 280
M20 434 515 320 380 610 730 450 540
M24 675 815 500 600 1050 1275 780 940
M30
1250
920 1100 2000 2400 1470 1770
M36
2175
1600
3500 4200 2580 3090
Note 1: Bolt head identification marks as per grade. Manufacturing mark will vary.
Note 1: Bolt head identification marks as per grade. Manufacturing marks will vary.
*Thick nuts must be used with Grade 8 bolt
METRIC FASTENER (ISO) TORQUE CHART
METRIC FASTENER (ISO) TORQUE CHARTMETRIC FASTENER (ISO) TORQUE CHART
METRIC FASTENER (ISO) TORQUE CHART
Note :
Note :Note :
Note : Use these torques. unless special torques are specified. Values are UNC and UNF thread
fasteners,plated or unplated as received from supplier. Fasteners can be dry or lubricated with normal engine
oil. Values do not apply if graphite, moly-disulphite or other extreme pressure lubricant is used
Because of the low ductility
of these fasteners, the
torque range is to be
determined individually for
each application.
As s general rule, the
torque ranges specified for
grade 10.9 fasteners can be
used satisfactorily on 12.9
fasteners
*M14 is not a preferred
size.
Bolt Size
8.8 10.9 12.9
8.8
10.9
12.9
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