We have a support article relating to this question, but essentially the hole you see is not designed to be an inspection hole. It is a plating hole, to allow the finish materials to reach the bottom of the crimp bore and help ensure performance. As such it is not relevant to IPC-A-620. Applying a crimp using the correct tools will indeed overlap the plating hole by 25 to 50%, but this is intended and expected. The design of the Datamate connector is so compact, there is no room to move the crimp area away from this hole without making the whole connector design larger.

The contact will be exposed outside the rear of the housing by approximately 0.2-0.4mm. If this contact area is live when someone touches it then it could be a potential hazard. We’ve not had any previous instances of this happening and we would anticipate that standard safety protocols would reduce this risk. Generally it seems these connectors are not used in applications where the connection is live during mating or unmating. If this is a risk within your particular application, then we would recommend something like backpotting to cover the ends of these contacts. Please do contact our Experts if you need further assistance.

The torque value for mating jackscrews is 23cmN max. This value is given in the Component Specification C005xx (page 14).