Emerson CSI 9420 Reference Manual page 82

Setup
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6.
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For stud mount: If the mounting stud is still not seated against the spot face after
you apply the correct torque force, it indicates that the tap hole is not deep enough.
Remove the mounting and tap a deeper hole.
Apply a thin coat of semi-permanent thread locker to the threads on the sensor
housing.
Place the sensor onto the mounting stud and hold it to create the least amount of
cable strain and cable exposure. While holding the sensor, hand-tighten the 9/16 in.
captive nut and use a torque wrench with 9/16 in. open end to finish tightening to
2–5 ft-lb (2.7–6.8 N-m).
Figure 3-6: Hand-tighten the captive nut
If the mounting stud does not disengage from the sensor, use a flathead screwdriver
to hold the stud and turn the hex nut counter-clockwise with a wrench.
MHM-97408, Rev 15