MATE-N-LOK socket contact for 10-14 AWG
The 350390-1 is a tin-plated socket contact from the TE Connectivity MATE-N-LOK series, accepting 10-14 AWG wire with a crimp termination.
Wire gauge and plating across the series
The 350390-1 handles 10-14 AWG, a heavier wire gauge than the 929989-8 (17-20 AWG) or the 1-1326032-0 (16 AWG) — all three are tin-plated socket contacts in the same MATE-N-LOK family, so the selection is driven by the wire size in the harness.