Tightening torque 1. Tightening torque for bolts Tightening torque for bolts is indicated in the text as shown below. Tighten each bolt to the specified torque. If tightening torque for a bolt is not specified in the text, tighten it according to Table 1. Remarks 1. The thread diameter is the nominal diameter. For example, 16 mm is expressed as M16 and 26 mm is expressed as M20. The pitch in Table 1 is the distance that the bolt advances every turn in the axial direction (Unit: mm). 2. The bolt length is dimension c in Fig. 1. 3. The applicable socket size is expressed as 24 mm, 30 mm, etc. Since 24 mm, 30 mm, etc. cor- respond to dimension b in Fig.
1, an applicable socket can be selected from Table 1, too. 4. Tightening torque is expressed as QQQ www or QQQ ± RR . If the target tightening torque is set, expression of QQQ ± RR is applied. Fig. 1 a : Bolt thread diameter (Nominal diameter) b : Width across flats of bolt head c : Bolt length d : Threaded part of bolt 17 Part No. of bolt TTTTT-TTTTT Part No. of washer EEEEE-EEEEE Bolt specification Thread size (Diameter, pitch, length) Tool (Socket) Applicable socket size Tightening torque Nm {QQQ kgm}