Reference Document of Tightening Torque (Estimated) Torque Unit and Conversion TableM 2M 2.5M 3M 3.5M 4M 5M 6M 7M 8M10M12M14M16M18M20M22M24M27M30M33M36M39M42M45M48M52M56M60M64M68M72M76M80 0.120 0.238 0.319 0.447 0.536 1.10 1.96 3.08 4.54 9.18 15.6 26.2 37.9 75.2 131 209 325 447 635 865 1,100 1,610 2,180 2,970 3,810 4,930 6,080 7,630 9,120 11,800 14,800 18,300 22,300 27,000 32,300 38,300 45,000 0.915 1.63 2.56 3.79 7.67 13.0 21.8 31.6 62.6 109 174 271 373 529 720 915 1,340 1,820 2,470 3,180 4,110 5,080 6,370 7,620 9,880 12,300 15,300 18,500 22,500 26,900 31,900 37,500 0.650 1.16 1.82 2.70 5.47 9.27 15.5 22.5 44.5 77.6 124 194 266 376 511 650 951 1,290 1,760 2,260 2,920 3,610 4,540 5,440 7,040 8,710 10,900 13,100 16,000 19,100 22,700 26,600 0.487 0.870 1.37 2.02 4.09 6.97 11.6 16.9 33.4 58.3 92.7 145 199 282 384 488 713 971 1,320 1,690 2,190 2,710 3,400 4,060 5,290 6,560 8,180 9,890 12,000 14,400 17,000 20,000 0.245 0.434 0.683 1.01 2.04 3.47 5.85 8.41 16.7 29.1 46.4 72.3 100 141 192 244 358 484 661 848 1,100 1,350 1,700 2,030 2,640 3,270 4,080 4,930 5,970 7,150 8,540 10,000Steel boltStrength classication4.6Unit（N・m）kgf・cmkgf・m gf・cm1kgf・m＝ 100kgf・cm 1kgf・cm＝ 1,000gf・ cm1kgf・cm＝ 10kgf・ mm1kgf・cm＝0.09807N・m1kgf・cm＝0.8680lbf・in1kgf・cm＝0.07233lbf・ft1kgf＝9.807N1kgf＝2.205lbf1cm＝0.3937in1m＝3.281ft1in＝2.540cm1ft＝0.3048m（1ft＝12in）1N＝0.1020kgf1N＝0.2248lbf1lbf＝0.4536kgf1lbf＝4.448N（1lbf＝16ozf）1N・m＝10.20kgf・cm 1N・m＝ 8.851lbf・in1N・m＝ 0.7376lbf・ft1lbf・in＝ 1.152kgf・cm1lbf・in＝ 0.1130N・m1lbf・ft＝13.83kgf・cm 1lbf・ft＝ 1.356N・m1N・m ＝100N・ cm1kN・m ＝ 1,000N・m1lbf・ft＝12lbf・in1lbf・in＝16ozf・inN・mCN・m（N・cm）kN・mlbf・inlbf・ftozf・in1in＝2.540cm １ft＝30.48cm １lbf＝0.4536kgf １in・lbs＝1,152kgf・cm １ft・lbs＝13.83kgf・cm1kgf・cm＝0.8680in・lbsNote) lbf · in and lbf · ft may be written as in · lbs or ft · lbs respectively.NominalsizeStrength classication12.9Strength classication10.9Strength classication8.8Strength classication6.8Note) The torque value varies depending on the operating conditions, please use it only as a reference value when purchasing a torque wrench. Torque coefficient 0.2, axial force calculated as 60% of bolt strength, according to JIS strength classification for bolt.Unit of torqueConversion within the same unitUnit of forceUnit of lengthConversion between other unitsGravity unit (kg · cm)SI unit (Nm・m)Inch pound Classication493
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