The locking ramp on each side holds the pair together in vibration — common in industrial control cabinets, automotive harnesses, and equipment where the connector sees movement.
The integrated strain relief at the back of the housing grips the wire bundle and reduces pull-out at the contact retention tines. If you're re-pinning an existing harness, the same contact family crosses into the 104422-2 housing.
How It Compares to a Sibling
The closest peer in the same series is the 1-2333134-5, a 30-position dual-row receptacle at 0.079" (2.00mm) pitch. The 104422-2 runs the standard 0.100" pitch, so the footprint and header compatibility are different — the 20-position housing mates with a 2x10 header, while the 30-position mates with a 2x15 header at the tighter pitch. Choose by circuit count and board footprint, not by housing form factor.