The 207530-7: 18 positions in a 3-row × 6-column grid at 5.00 mm pitch — the board footprint takes up about 25 mm along the row axis, and the 3-row layout keeps the connector narrower than a 2-row × 9-column arrangement would be. The latch-holder fastening and mounting flange mean this header stays put once bolted to the panel or bracket — vibration won't back the connector out the way a simple friction lock might.
Mating half and harness compatibility
Termination is solder — through-hole posts 4.60 mm long. No crimp option on this header; the cable-side connector will use crimp terminals inserted into a housing.
Mechanical fit — what the dimensions mean on the board and in the panel
The mounting flange adds two screw-down points outside the contact grid — use these to transfer cable strain to the panel, not the solder joints.