13. TIGHTENING TORQUE FOR BOLTS AND NUTS 13.2 Tightening Torques for Standard Bolts and Nuts Note) Lubricating oil is not applied to threaded portion and seat surface. 82E-5 – 98E-5 SERIES 13-3 Item Nominal thread diameter x pitch Tightening torque Nm {kgm} Remarks Hexagon bolt (7T) and nut M6 x 1 9.8 – 11.8 {1.0 – 1.2} Use 80% of the value at left when the tight- ening part is aluminum. Use 60% of the value at left for 4T bolts and lock nuts.
M8 x 1.25 22.6 – 28.4 {2.3 – 2.9} M10 x 1.5 44.1 – 53.9 {4.5 – 5.5} M12 x 1.75 78.4 – 98.0 {8.0 – 10} M14 x 1.5 127.5 – 147.1 {13 – 15} M16 x 1.5 215.7 – 235.4 {22 – 24} PT plug 1/8 9.8 {1.0} — 1/4 19.6 {2.0} 3/8 29.4 {3.0} 1/2 58.8 {6.0} Pipe joint bolt M8 12.7 – 16.7 {1.3 – 1.7} — M10 19.6 – 25.4 {2.0 – 2.6} M12 24.5 – 34.3 {2.5 – 3.5} M14 39.2 – 49.0 {4.0 – 5.0} M16 49.0 – 58.8 {5.0 – 6.0}