What this 3-position plug housing does
The TE Connectivity 350766-4 is a 3-position plug housing from the Universal MATE-N-LOK series, designed as a free-hanging (in-line) connector for wire-to-wire or wire-to-board harness applications. The housing accepts either male or female crimp contacts — the same cavity works for both — which simplifies inventory if your design uses a mix of pin and socket terminals across the harness. The single-row layout with latch-lock fastening keeps the mated pair secure under vibration typical of industrial control panels, appliance wiring, and automotive interior harnesses.
Contacts: what you need to order separately
The housing ships without contacts — the note on the line is clear: Contacts Not Included. You'll need to order the matching Universal MATE-N-LOK crimp terminals separately. Because the housing accepts both male and female contacts, the same part number works whether you're building the plug side or the receptacle side of a harness. The crimp termination method means you're seating the terminal into the wire with a standard hand or pneumatic crimp tool, then inserting it into the housing until the latch locks it in place.
Material and environmental range
That covers most indoor industrial and automotive interior environments — engine bay or under-hood exposure would push past the upper limit, but inside a cabinet or passenger compartment it's fine. The nylon body carries the UL94 V-0 flame rating typical for equipment inside an enclosure.