Tightening torques for union nuts as per DIN 3859-2
1 Union nut
2 Screw fixture
3 O-ring
4 Ball-type union
Union nut: When installing the ball-type union, first tighten the union nut firmly by hand (noticeable in-
crease in force), then tighten another 1/4 turn (90°) past this point.
Tightening torques for threaded journals with O-rings as per ISO 6149-2
Thread
Torque (Nm) +10%
M8 x 1
10
M10 x 1
20
M12 x 1.5
35
M14 x 1.5
45
M16 x 1.5
55
M18 x 1.5
70
M20 x 1.5
1)
80
M22 x 1.5
100
M27 x 2
170
22 | General Information | MS150119/00E 2014-08
TIM-ID: 0000002333 - 016
