Service and Repair Manual
Appendix
Standard tightening torques
Thread Y Form A with sealing edge Form B with sealing ring Form E with flat sealing
G 1/8A
7 Nm
5 ft-lb
14 Nm
10 ft-lb
14 Nm
10 ft-lb
G 1/4A
28 Nm
21 ft-lb
28 Nm
21 ft-lb
28 Nm
21 ft-lb
G 1/4A
28 Nm
21 ft-lb
28 Nm
21 ft-lb
28 Nm
21 ft-lb
G 3/8A
36 Nm
27 ft-lb
56 Nm
41 ft-lb
56 Nm
41 ft-lb
G 1/2A
52 Nm
38 ft-lb
112 Nm
83 ft-lb
72 Nm
53 ft-lb
G 1/2A
52 Nm
38 ft-lb
80 Nm
59 ft-lb
72 Nm
53 ft-lb
G 3/4A
72 Nm
53 ft-lb
144 Nm
106 ft-lb
144 Nm
106 ft-lb
G 1A
120 Nm
89 ft-lb
264 Nm
195 ft-lb
248 Nm
183 ft-lb
G 1 1/4A
192 Nm
142 ft-lb
432 Nm
319 ft-lb
360 Nm
266 ft-lb
G 1 1/2A
232 Nm
171 ft-lb
504 Nm
372 ft-lb
432 Nm
319 ft-lb
Tab. 72: Standard torques for imperial thread unions L series, for aluminium – see figure above
Standard torques for imperial thread unions S series (up to 800
bar/11603 Psi) for aluminium
According to ISO1179-1 / DIN 3852-T2-Form X / DIN 3852-T3-Form X BSP 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
G 1/8A
29 Nm
21 ft-lb
45 Nm
33 ft-lb
45 Nm
33 ft-lb
G 1/4A
28 Nm
21 ft-lb
44 Nm
32 ft-lb
32 Nm
24 ft-lb
G 1/4A
28 Nm
21 ft-lb
44 Nm
32 ft-lb
32 Nm
24 ft-lb
G 3/8A
36 Nm
27 ft-lb
72 Nm
53 ft-lb
64 Nm
47 ft-lb
G 1/2A
52 Nm
38 ft-lb
120 Nm
89 ft-lb
92 Nm
68 ft-lb
G 1/2A
52 Nm
38 ft-lb
104 Nm
77 ft-lb
92 Nm
68 ft-lb
KD83V16 33525088901_2_1 EN_US
2021-07
© 2021 by Kohler Co. All rights reserved.
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