TABLE OF STANDARD TIGHTENING TORQUES 00-12 • Use specified bolts and nuts and tighten them at specified torques according to the following table, unless otherwise specified. • Threads and contact seats shall be dry. • Where there is a difference in strength classification between the nut and bolt (or stud bolt), the torque specified for the bolt shall apply. Hex-head Bolt and Stud Bolt Unit:
N·m (kgf·m) [lbf·ft] Strength classification 4T 7T 8T Repre- sentation Diameter symbol (Stud) (Stud) (Stud) 02154 M5 2 to 3 (0.2 to 0.3) [1.48 to 2.21] – 4 to 6 (0.4 to 0.6) [2.95 to 4.43] – 5 to 7 (0.5 to 0.7) [3.69 to 5.16] – M6 4 to 6 (0.4 to 0.6) [2.95 to 4.43] – 7 to 11 (0.7 to 1.1) [5.16 to 8.11] – 8 to 12 (0.8 to 1.2) [5.90 to 8.85] – M8 9 to 14 (0.9 to 1.4) [6.64 to 10.3] – 17 to 26 (1.7 to 2.6) [12.5 to 19.2] – 20 to 29 (2.0 to 3.0) [14.8 to 21.4] – M10 19 to 28 (1.9 to 2.8) [14.0 to 20.6] 18 to 26 (1.8 to 2.7) [13.3 to 19.2] 36 to 52 (3.5 to 5.5) [26.6 to 38.4] 33 to 49 (3.5 to 5.0) [24.3 to 36.1] 45 to 60 (4.5 to 6.0) [33.2 to 44.3] 41 to 59 (4.3 to 6.9) [30.2 to 43.5] M12 35 to 50 (3.4 to 5.0) [25.8 to 36.9] 31 to 46 (3.1 to 4.7) [22.9 to 33.9] 70 to 95 (7.0 to 9.5) [51.6 to 70.1] 65 to 85 (6.5 to 8.5) [47.9 to 62.7] 85 to 110 (8.5 to 11) [62.7 to 81.1] 75 to 100 (7.5 to 10) [55.3 to 73.8] M14 60 to 85 (6.0 to 8.5) [44.3 to 62.7] 55 to 75 (5.5 to 7.5) [40.6 to 55.3] 120 to 160 (12 to 16) [88.5 to 118] 110 to 140 (11 to 14) [81.1 to 103] 130 to 180 (13 to 18) [95.9 to 133] 120 to 160 (12 to 17) [88.5 to 118] M16 90 to 130 (9.5 to 13) [66.4 to 95.9] 90 to 120 (9.0 to 12) [66.4 to 88.5] 180 to 240 (18 to 24) [133 to 177] 160 to 220 (16 to 22) [118 to 162] 200 to 270 (20 to 27) [148 to 199] 190 to 260 (19 to 26) [140 to 192] M18 140 to 190 (14 to 19) [103 to 140] 120 to 160 (12 to 16) [88.5 to 118] 260 to 340 (25 to 35) [192 to 251] 220 to 290 (22 to 30) [162 to 214] 290 to 390 (30 to 40) [214 to 288] 260 to 340 (26 to 35) [192 to 251] M20 190 to 260 (19 to 26) [140 to 192] 170 to 230 (17 to 23) [125 to 170] 350 to 470 (36 to 48) [251 to 347] 320 to 420 (32 to 43) [236 to 310] 410 to 550 (41 to 56) [302 to 406] 370 to 490 (37 to 50) [273 to 361] M22 260 to 340 (26 to 35) [192 to 251] 230 to 300 (23 to 31) [170 to 221] 470 to 640 (48 to 65) [347 to 472] 430 to 570 (43 to 58) [317 to 420] 550 to 740 (56 to 75) [406 to 546] 490 to 670 (50 to 68) [361 to 494] M24 340 to 450 (34 to 46) [251 to 332] 290 to 390 (29 to 40) [214 to 288] 630 to 840 (63 to 86) [465 to 620] 540 to 730 (55 to 74) [398 to 538] 730 to 980 (74 to 100) [538 to 723] 630 to 840 (64 to 86) [465 to 620]