Appendix
Service and Repair Manual
Standard tightening torques
5.3.6 Standard torques for flange joints
Fig. 346: Flange joints overview
Standard torques for metric thread unions L series (up to 500 bar/
7252 Psi) for steel
According to ISO 9974-2/3 / ISO 6149-2/3 / DIN 3852-1/2, metric threading.
Information
Tolerances of the indicated tightening torques: 10 %.
Always lubricate the thread before tightening these parts (engine oil).
Thread Y
Form A with
sealing edge
Form B with
sealing ring
Form E with flat
sealing
Form F with O-ring
M 10 x 1.0
9 Nm
7 ft-lb
18 Nm
13 ft-lb
18 Nm
13 ft-lb
15 Nm
11 ft-lb
M 12 x 1.5
20 Nm
15 ft-lb
30 Nm
22 ft-lb
25 Nm
18 ft-lb
25 Nm
18 ft-lb
M 14 x 1.5
35 Nm
26 ft-lb
45 Nm
33 ft-lb
45 Nm
33 ft-lb
35 Nm
26 ft-lb
M 16 x 1.5
45 Nm
33 ft-lb
65 Nm
48 ft-lb
55 Nm
41 ft-lb
40 Nm
30 ft-lb
M 18 x 1.5
55 Nm
41 ft-lb
80 Nm
59 ft-lb
70 Nm
52 ft-lb
45 Nm
33 ft-lb
M 22 x 1.5
65 Nm
48 ft-lb
140 Nm
103 ft-lb
125 Nm
92 ft-lb
60 Nm
44 ft-lb
M 26 x 1.5
90 Nm
66 ft-lb
190 Nm
140 ft-lb
180 Nm
133 ft-lb
100 Nm
74 ft-lb
M 33 x 2.0
150 Nm
111 ft-lb
340 Nm
251 ft-lb
310 Nm
229 ft-lb
160 Nm
118 ft-lb
M 42 x 2.0
240 Nm
177 ft-lb
500 Nm
369 ft-lb
450 Nm
332 ft-lb
210 Nm
155 ft-lb
M 48 x 2.0
290 Nm
214 ft-lb
630 Nm
465 ft-lb
540 Nm
398 ft-lb
260 Nm
192 ft-lb
Tab. 66: Standard torques for metric thread unions L series, for steel – see figure above
280
© 2021 by Kohler Co. All rights reserved.
KD83V16 33525088901_2_1 EN_US
2021-07
