IP68 nickel plated brass glands. Made of brass which is then nickel plated in order to improve resistance to the harsh environmental conditions in which they are to be used. The tightening of the nut causes the seal to deform so that, in addition to guaranteeing an IP68 watertight seal of 5 bars pressure, it also ensures exceptional cable retention. A further o-ring seal located in an appropriate shaped housing also maintains the levels of water tightness at the thread. ISO Metric and complies with CEI EN 60423.