These connectors are a 312 series or 8mm. Both connectors are polarized to prevent incorrect mating. A positive locking latch automatically engages at mating for the single circuit connector. the standard connector used in fusible links. The tin plated crimp contacts, are easily snapped into the housings by hand. Applicable terminal wire range is 1.3 to 5.0mm2. Note: The plug housing is also referred to as the female housing, as it accepts the female terminal. The receptacle housing is also referred to as the male housing, as it accepts the male tab terminal.