[NTG-context] Non-breaking spaces

For typographical fine-tuning one needs often non-breaking spaces. But not only full spaces, but half spaces, or even less. I have this example: and\hskip1pt/or But \hskip1pt is not non-breaking, like "\," (half space) is. How to make it non-breaking? Or are there predfined ones, analog to \, ? Huseyin