The 65823-394LF: Phosphor bronze alloy contact material provides the spring force behind the square pin; the gold layer handles the wipe on insertion.
Retention and Vibration Resistance
Latch lock/eject hooks, short type, engage the mating socket's latch ears — the pair stays mated under vibration without relying on the pin friction alone. Mounting flanges on the header body accept a screw or rivet to the board for additional mechanical hold-down in high-shock environments.