Ducati Monster 696 Owner's Manual page 143

Insert the spark plug in the cylinder head and screw
in fully by hand.
Tighten to a torque of 20 Nm.
If you do not have a torque wrench, after hand-
tightening the spark plug, turn it an additional half turn
with the wrench provided in the tool kit.
Important
Do not use spark plugs with an unsuitable heat
rating or incorrect reach. The spark plug must be
tightened correctly.
144