For a tight connection to an expansion tank or to protect the hose/cable when drilling through sheet metal (e.g. the housing wall). Can simply be pushed through a hole and screwed with the nut, or screwed directly into an M12 thread. The tightness is guaranteed by a Perbunan sealing sleeve in the feedthrough. Technical data: Thread M12, Outside diameter from 3 to 6.5mm Scope of delivery: Feedthrough (with sealing sleeve) Attention: The bushing is delivered without a nut! Please order item 32012