It is a crimp-termination socket — the female half that mates with a pin or tab inside the matching housing. It accepts 22-26 AWG wire, which covers the typical signal and low-power circuit range in this connector family.
The 170365-3 is rated for 22-26 AWG wire. That range puts it on the smaller side for a Mini-Universal MATE-N-LOK contact — most applications will be signal circuits or low-current power feeds rather than main bus wiring. The crimp termination requires the matching TE hand tool or a semi-automatic applicator; the stamped barrel geometry is designed for a consistent crimp profile across the full wire range. If your harness uses 18 AWG or larger, you need the sibling contact in the same series that steps up to the heavier wire gauge.
Gold Plating — Why It Matters for the Build
For a field-serviceable harness that gets unmated and re-mated during maintenance, or for equipment in a mildly corrosive industrial cabinet, this plating grade buys you reliable contact resistance over the life of the assembly.