12-Position 3.96mm Pitch Header
The 1-640388-2: The housing is shrouded on one wall and uses a friction lock to secure the mating receptacle, reducing the chance of accidental disconnection under vibration.
Shrouded Housing and Friction Lock
The single-wall shroud guides the receptacle into alignment during mating and provides basic polarization — it won't prevent a wrong-side insertion, but it keeps the pins from bending on a straight mate.
