0-15 STANDARD BOLT & NUT TIGHTENING TORQUE Tightening torque of standard bolts and nuts are not indicated throughout the manual. Use the charts and table below to judge the standard tightening torque. 1. Find the class of the bolt strength on the table below and then find the bolt tightening torque on the tightening torque table. 2. The nut tightening torque can be judged from its corresponding bolt type. BOLT STRENGTH CLASS IDENTIFICATION METHOD Identification by bolt shape Identification by part No. Hexagon head bolt Part No. 91611-40625 Length (mm) Nominal diameter (mm) Class Nominal diameter Length Stud bolt Part No.
92132-40614 Length (mm) Nominal diameter (mm) Class Nominal diameter Length Shape and class Class Hexagon head bolt Hexagon bolt (standard) Bolt with raised or etched numeral on head 4 = 4T 5 = 5T 6 = 6T 7 = 7T 8 = 8T No mark 4T Hexagon flange bolt No mark 4T Hexagon head bolt (standard) Bolt with two raised lines on head 5T Hexagon flange bolt Bolt with two raised lines on head 6T Hexagon head bolt (standard) Bolt with three raised lines on head 7T Hexagon head bolt (standard) Bolt with four raised lines on head 8T Welded bolt 4T Stud bolt No mark 4T 2 mm groove(s) on one/both edge(s) 6T