In order to make devices with cable glands pluggable, Franz Binder introduced an M12 connector series that is screwed into the existing M16x1/PG9 thread. Because the thread is generally not positioned, problems with the cable gland direction of the angled mating halves may be encountered. For this reason a positionable panel mount connector is commonly used for such cases. During assembly the connector is positioned with the cable gland of the counterpart pointing in the desired direction. Then the fixing nut is screwed towards the housing. The housing materials of the 4-12 pole versions in A-coding and the 4 and 5 pole version in B-coding have been changed from nickel-plated brass to nickel-plated diecast zinc. This makes the potting unnecessary, because the contact insert is keyed and locked in the housing.