The most common mistake with this order code is assuming contacts come in the bag. They do not. The crimp termination means you'll need the correct applicator tooling for your wire gauge; the series supports a range of AWG sizes depending on the terminal selected.
The locking ramp engages audibly when fully seated — you'll feel it click home. The panel mount snap-in feature means it pushes into a rectangular cutout in the panel or chassis and locks without hardware. No tools needed for the install, but getting it back out requires depressing the locking ramp with a small flat-blade screwdriver.
It is a current-production part from TE Connectivity, available through normal distribution.