Method for producing an electrical plug-in connector jack, comprising a cylindrical jack sleeve, wherein the jack sleeve is designed with a receiving space in which a cylindrical contact lamination lattice with a plurality of contact laminations which extend in parallel is inserted, having the following method steps: a. Producing an essentially flat sheet-metal part consisting of two end sections (E1, E2) and a central portion situated between them, wherein the sheet-metal part has two longitudinal side edges (20a, 20b) which extend in each case from one end section (E1, E2) to the opposite end section (E1, E2), and in each case one transverse side edge (21a, 21b) which in each case delimits one of the two end sections (E1, E2), wherein, in each case in an extension of the longitudinal side edges (20a, 20b), two retaining arms (22a, 22b) protrude at the front of the end section from the transverse side edge of the sheet-metal part, wherein the retaining arms (22a, 22b) have, at their respective free retaining arm end (23a, 23b), a latching lug for engagement in an undercut which in each case is designed as a corresponding recess in the opposite end section of the piece of sheet metal; b. Introducing an intended bending point for each of the retaining arms (22a, 22b) in the longitudinal side edge (20a, 20b) outwardly delimiting the respective retaining arm (22a, 22b); c. Rolling the sheet-metal part to form a cylindrical jack sleeve, wherein, when they bear against the front side of the opposite end section of the sheet-metal part as intended, the retaining arms (22a, 22b) attached to the end section of the sheet-metal part are first sprung and/or bent outward about the intended bending point until the latching lugs of the retaining arms (22a, 22b) spring some way further into the corresponding recess. a. Producing an essentially flat sheet-metal part consisting of two end sections (E1, E2) and a central portion situated between them, wherein the sheet-metal part has two longitudinal side edges (20a, 20b) which extend in each case from one end section (E1, E2) to the opposite end section (E1, E2), and in each case one transverse side edge (21a, 21b) which in each case delimits one of the two end sections (E1, E2), wherein, in each case in an extension of the longitudinal side edges (20a, 20b), two retaining arms (22a, 22b) protrude at the front of the end section from the transverse side edge of the sheet-metal part, wherein the retaining arms (22a, 22b) have, at their respective free retaining arm end (23a, 23b), a latching lug for engagement in an undercut which in each case is designed as a corresponding recess in the opposite end section of the piece of sheet metal; b. Introducing an intended bending point for each of the retaining arms (22a, 22b) in the longitudinal side edge (20a, 20b) outwardly delimiting the respective retaining arm (22a, 22b); c. Rolling the sheet-metal part to form a cylindrical jack sleeve, wherein, when they bear against the front side of the opposite end section of the sheet-metal part as intended, the retaining arms (22a, 22b) attached to the end section of the sheet-metal part are first sprung and/or bent outward about the intended bending point until the latching lugs of the retaining arms (22a, 22b) spring some way further into the corresponding recess.