NSK PTL-CL-LED Manuel D'instructions page 7

( 2 ) Approach in the use of coupling cap
As instruction wrench
When coupling is connecting to a hose, use it as safeguard use of the coupling.
As for protection against dust
During the sterilization, when coupling is removed from handpiece, the inside of coupling
be exposed and garbage, various germs, should enter, It is not sanitarily good, therefore
use it as a protection-against-dust cap.
Hold
Tighten
Fig. 8
Hose Nut
Coupling
10