the line of mpm din connectors is designed to reduce the number of components making them easier to assemble and with fewer parts to stock. they provide repeatable, unsurpassed ip67 sealing performance using an external n......the line of mpm din connectors is designed to reduce the number of components making them easier to assemble and with fewer parts to stock. they provide repeatable, unsurpassed ip67 sealing performance using an external nut over the cable. traditional form a and b connectors require three different styles for pg07, pg09 and pg11. however the external nut accepts a wider range of cables from 4mm to 9mm, reducing the number of parts from 3 to 1. the new generation of din connectors is available in our complete range of field attachable sizes including form a, b and c.