Crimp termination, gold-plated socket
The 1586315-4 is a stamped socket in TE Connectivity's VAL-U-LOK series, terminated by crimp and accepting 18-22 AWG wire.
Tin vs gold — same series, different duty
The 1-1326032-0 is a tin-plated VAL-U-LOK socket for 16 AWG wire, while the 1586315-4 carries gold plating at 30.0µin (0.76µm) and accepts 18-22 AWG — the gold finish drives higher mating cycle life and corrosion resistance.
