Lauda IN 130 T Operation Manual page 18

Fig. 3: Ring bolt (example)
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Fig. 2: Unpacking instructions
7. Fig. 2: Remove the ring bolts from the packaging.
8. Fig. 4: Screw the two ring bolts all the way into the thread connection
Ç (M10 or M16) on the top of the casing. Turn them clockwise to do
so.
Integral Process Thermostats and High-Temperature Thermostats V6