Gold-plated socket, 18-22 AWG crimp
The 181299-2 is a gold-plated socket contact in the AMPMODU Mod I series, accepting 18-22 AWG wire with a crimp termination.
Tin vs gold in the same wire range
Within the AMPMODU Mod I 18-22 AWG socket family, the 181299-2 carries a 16.0µin (0.41µm) gold finish, while the 182198-1 and 102103-3 use tin plating — gold provides a lower and more stable contact resistance over multiple mating cycles.