Standard bolt tightening torque table Refer to the following table for bolts other then described above Others : 1. The above torque rating have been determined to 70% or so of the limit value for bolt elas- 2. Tension is calculated by multiplying tensile strength by cross section of thread. ticity. 3. Special screws should be tightened to 85% or so of the standard value. For example, a screw coated with MoS2 should be tightened to 60% or so of the stan- dard value. Tightening torque for hollow screw (4-hole) * :
Adopted in DAEWOO engine - 177 - APPENDIX Diameter B pitch (mm) Degree of strength 3.6 4.6 4.8 5.6 5.8 6.6 6.8 6.9 8.8 10.9 12.9 (4A) (4D) (4S) (5D) (5S) (6D) (6S) (6G) (8G) (10K) (12K) Limit value for elasticity (kg/mm2) 20 24 32 30 40 36 48 54 64 90 108 Tightening torque (kg•m) M5 0.15 0.16 0.25 0.22 0.31 0.28 0.43 0.48 0.5 0.75 0.9 M6 0.28 0.30 0.45 0.4 0.55 0.47 0.77 0.85 0.9 1.25 0.5 M7 0.43 0.46 0.7 0.63 0.83 0.78 1.2 1.3 1.4 1.95 2.35 M8 0.7 0.75 1.1 1 1.4 1.25 1.9 2.1 2.2 3.1 3.8 M8 1 B 0.73 0.8 1.2 1.1 1.5 1.34 2.1 2.3 2.4 3.35 4.1 M10 1.35 1.4 2.2 1.9 2.7 2.35 3.7 4.2 4.4 6.2 7.4 M10 1 B 1.5 1.6 2.5 2.1 3.1 2.8 4.3 4.9 5 7 8.4 M12 2.4 2.5 3.7 3.3 4.7 4.2 6.3 7.2 7.5 10.5 12.5 M12 1.5 B 2.55 2.7 4 3.5 5 4.6 6.8 7.7 8 11.2 13.4 M14 3.7 3.9 6 5.2 7.5 7 10 11.5 12 17 20 M14 1.5 B 4.1 4.3 6.6 5.7 8.3 7.5 11.1 12.5 13 18.5 22 M16 5.6 6 9 8 11.5 10.5 17.9 18.5 18 26 31 M16 1.5 B 6.2 6.5 9.7 8.6 12.5 11.3 17 19.5 20 28 33 M18 7.8 8.3 12.5 11 16 14.5 21 24.2 25 36 43 M18 1.5 B 9.1 9.5 14.5 12.5 18.5 16.7 24.5 27.5 28 41 49 M20 11.5 12 18 16 22 19 31.5 35 36 51 60 M20 1.5 B 12.8 13.5 20.5 18 25 22.5 35 39.5 41 58 68 M22 15.5 16 24.5 21 30 26 42 46 49 67 75 M22 1.5 B 17 18.5 28 24 34 29 47 52 56 75 85 M24 20.5 21.5 33 27 40 34 55 58 63 82 92 M24 1.5 B 23 25 37 31 45 38 61 67 74 93 103 Material M8 M10 M12 M14 M16 M18 M22 M26 M30 M38 SM25C - 1.6 2.5 3.5 4.5 5.5 9.0 13.0 18.0 30.0 *SUM22L 0.8 1.8 3.0 4.0 5.5 6.5 11.0 16.0 20.0 35.0 STS304 0.8 1.8 3.0 4.0 5.5 6.5 11.0 16.0 20.0 35.0