24 Circuits at 0.100" Pitch – Board Footprint and BOM Fit
The pinout is a simple 2 x 12 matrix; row one is pins 1-12, row two is pins 13-24, with the friction lock on the side of the housing that orients the mating keyway.
Friction Lock and Through-Hole – Vibration Resistance and Assembly
It's not a secondary TPA, but it does prevent the pair from backing apart under moderate vibration — think industrial control panels or test equipment, not a engine compartment.
No IP rating is listed — this is an unsealed header, so it's not for washdown or outdoor direct-spray locations without a conformal coating or sealed mating half.