26
TORQUE TIGHTENING CHART
SAE FASTENER TORQUE CHART
Note: Use these torques, unless special torques are specified. Values are for 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-disulphide or other extreme pressure
lubricant is used.
SAE Grade No. 2 5 8*
Bolt head identification (see
note 1)
LB FT LB FT LB FT LB FT LB FT LB FT
Bolt Size
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
1 1/8 800 880 1085 1193 1280 1440 1736 1953
1 1/4 1120 1240 1519 1681 1820 2000 2468 2712
1 3/8 1460 1680 1980 2278 2380 2720 3227 3688
1 1/2 1940 2200 2631 2983 3160 3560 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, unless special torques are specified. Values are for 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-disulphide or other extreme pressure
lubricant is used.
ISO Class No. 8.8 10.9 12.9
Bolt head identification (see
note 1)
Nm LB FT Nm LB FT Nm LB FT
Bolt Size
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 1500 920 1100 2000 2400 1470 1770
M36 2175 2600 1600 1950 1120 1240 1519 1681
Because of the low ductility of these
fasteners, the torque range is to be
determined individually for each
application. As a 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.
Note 1: Bolt head identification marks as per grade. Manufacturing marks will vary.
16 Series, Model - 2816