The M16x1/PG9 thread is screwed into an M12 connector to enable the construction of pluggable devices with cable glands. 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 against the housing.
The housing materials in the 4-12 pole panel mount versions in A-coding have been converted 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.