O O
BOLT TORQUE
BOLT TORQUE SPECIFICATIONS
GENERAL TORQUE SPECIFICATION TABLE
Use the following torques when special torques are not given. These values apply to fasteners as
received from suppliers, dry, or when lubricated with normal engine oil. They do not apply if special
graphited or moly disulphide greases or other extreme pressure lubricants are used. This applies to both
UNF and UNC threads. Remember to always use grade five or better when replacing bolts.
SAE Grade No. 2 5 8*
Bolt head identification
marks as per grade.
NOTE: Manufacturing
Marks Will Vary
TORQUE TORQUE TORQUE
Bolt Size
Pounds Feet
Newton-Meters
Pounds Feet
Newton-Meters
Pounds Feet
Newton-Meters
Inches Millimeters Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
1/4 6.35 5 6 6.8 8.13 9 11 12.2 14.9 12 15 16.3 30.3
5/16 7.94 10 12 13.6 16.3 17 20.5 23.1 27.8 24 29 32.5 39.3
3/8 9.53 20 23 27.1 31.2 35 42 47.5 57.0 45 54 61.0 73.2
7/16 11.11 30 25 40.7 47.4 54 64 73.2 86.8 70 84 94.9 113.9
1/2 12.70 45 52 61.0 70.5 80 96 108.5 130.2 110 132 149.2 179.0
9/16 14.29 65 75 88.1 101.6 110 132 149.2 179.0 160 192 217.0 260.4
5/8 15.88 95 105 128.7 142.3 150 180 203.4 244.1 220 264 298.3 358.0
3/4 19.05 150 185 203.3 250.7 270 324 366.1 439.3 380 456 515.3 618.3
7/8 22.23 160 200 216.8 271.0 400 480 542.4 650.9 600 720 813.6 976.3
1 25.40 250 300 338.8 406.5 580 696 786.5 943.8 900 1080 1220.4 1464.5
1-1/8 25.58 - - - - 800 880 1084.8 1193.3 1280 1440 1735.7 1952.6
1-1/4 31.75 - - - - 1120 1240 1518.7 1681.4 1820 2000 2467.9 2712.0
1-3/8 34.93 - - - - 1460 1680 1979.8 2278.1 2380 2720 3227.3 3688.3
1-1/2 38.10 - - - - 1940 2200 2630.6 2983.2 3160 3560 4285.0 4827.4
* Thick Nuts must be used with Grade 8 bolts
METRIC BOLT TORQUE SPECIFICATIONS
Coarse Thread Fine Thread
Size of Screw Grade No. Ptich (mm) Pounds Feet Newton-Meters Pitch (mm) Pounds Feet Newton-Meters
5.6 3.6-5.8 4.9-7.9 - -
M6 8.8 1.0 5.8-9.4 7.9-12.7 - - -
10.9 7.2-10 9.8-13.6 - -
5.6 7.2-14 9.8-19 12-17 16.3-23
M8 8.8 1.25 17-22 23-29.8 1.0 19-27 25.7-36.6
10.9 20-26 27.1-35.2 22-31 29.8-42
5.6 20-25 27.1-33.9 20-29 27.1-39.3
M10 8.8 1.5 34-40 46.1-54.2 1.25 35-47 47.4-63.7
10.9 38-46 51.5-62.3 40-52 54.2-70.5
5.6 28-34 37.9-46.1 31-41 42-55.6
M12 8.8 1.75 51-59 69.1-79.9 1.25 56-68 75.9-92.1
10.9 57-66 77.2-89.4 62-75 84-101.6
5.6 49-56 66.4-75.9 52-64 70.5-86.7
M14 8.8 2.0 81-93 109.8-126 1.5 90-106 122-143.6
10.9 96-109 130.1-147.7 107-124 145-168
5.6 67-77 90.8-104.3 69-83 93.5-112.5
M16 8.8 2.0 116-130 157.2-176.2 1.5 120-138 162.6-187
10.9 129-145 174.8-196.5 140-158 189.7-214.1
5.6 88-100 119.2-136 100-117 136-158.5
M18 8.8 2.0 150-168 203.3-227.6 1.5 177-199 239.8-269.6
10.9 175-194 237.1-262.9 202-231 273.7-313
5.6 108-130 146.3-176.2 132-150 178.9-203.3
M20 8.8 2.5 186-205 252-277.8 1.5 206-242 279.1-327.9
10.9 213-249 288.6-337.4 246-289 333.3-391.6
3915
6-8-95-2
(47 pages)
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