A pyrotechnical connecting interface of a pyrotechnical vehicle safety device comprises a socket which includes a housing with a plug-in port for accepting a plug, the pyrotechnical connecting interface further comprising pins which end in the plug-in port and via which electricity for activating a pyrotechnical charge can flow, the housing being an injection-molded housing and being provided with a peripheral wall which surrounds end portions of the pins at a distance therefrom and which ends in an end face on the side facing the plug; three radial undercuts for interlocking engagement with three associated latching fingers that are part of the plug are formed on the inner face of the peripheral wall, are spaced apart from each other in the peripheral direction, are entirely closed axially as well as radially outward, and are made in an injection-molding process.