As supplied by BOSCH they won't fit, thus someone, you or the person before neds to fit a kit, that is basically a collar that holds and additional seal on the top, without this bit not a snowballs chance in hell of stopping 3 bar spraying everywhere.
Depends whether the ones you want have it or not, I cut the very end of the cap off too, when using these, leaving just the other part on the injector.
tabetha