The TE Connectivity 4-640426-8 is an 18-position MTA-156 IDC receptacle — a single-row, free-hanging connector that terminates discrete 18 AWG wire directly through insulation displacement, no crimp tool required. Tin-plated female sockets and a locking ramp hold the mating header in place under vibration. The closed-end design blocks wire push-through on the last position.
The 18-position count matches a BOM line that needs 18 circuits on a single row. The 0.156" (3.96mm) pitch is the standard MTA-156 spacing — it sets the footprint for the mating header and the wire-to-wire spacing in the harness. The locking ramp provides positive retention against accidental unmate.
The IDC termination accepts 18 AWG discrete wire; the closed end prevents the wire from exiting past the last contact. Free-hanging mounting means it sits in-line with the cable, not on a board.