Crimp pin for 26-30 AWG signal circuits
The 170377-1 is the tin-plated pin contact in TE Connectivity's EI series, designed for 26-30 AWG wire and terminated by crimp.
Wire gauge and termination fit
The 170377-1 accepts 26-30 AWG wire, a finer gauge than the 16 AWG accepted by the 1326031-9 blade contact or the 17-20 AWG accepted by the 929989-8 socket — the EI series pin is sized for signal-level wiring, not power circuits.