4.20 mm Pitch, 4-Position Vertical Header with Board Lock
The 0039299046: This is especially useful in applications where the wire bundle is routed near the connector and sees occasional tugging — the board lock keeps the solder joints intact.
Locking Ramp and Tin-Plated Contact Interface
This is a tactile confirmation for the harness builder — you should hear it click. Under vibration, the ramp prevents the pair from backing out, which is critical in industrial and telecommunications equipment where the connector is inside a panel that sees fan or relay vibration. The square brass pins provide a reliable gas-tight interface with the receptacle terminal.
The natural color aids visual inspection of pin alignment during assembly.