Connector with "lock"

[dotneck335]

Where to find a connector like this with the "hole" for locking?

 

[duncan2]

Have a look at old computer motherboard USB connectors they come in many pin numbers or maybe can be converted.

 

[rayma]

Check the (huge) Molex catalog, many options.
Wire-to-Board Connectors - Molex

 

[MAAC0]

Have a look at old computer motherboard USB connectors they come in many pin numbers or maybe can be converted.

These aren't usually locked. They just slide over pins, and the spacing is not the same.
I believe they are 2.54mm

 

[rayma]

Old connectors are on a 0.1" grid.