Abstract: A screwdriver device for a threaded plug includes a structure which extends along an axis and includes a head and a shank connected to a first end of the head, wherein the head has a second end which opens onto a cavity suitable for containing a head of a plug, wherein along the axis the cavity includes at least a first portion having a lateral surface which has a first profile and at least a second portion having a lateral surface which has a second profile which is not coincident with the first profile.

Abstract: A threaded plug includes a structure which extends along an axis and includes a head, a body provided with an outer thread, and a clamping flange inserted between the head and the body; wherein the head includes, along the axis, at least one first portion having an outer lateral surface which features a first profile and at least one second portion having an outer lateral surface which features a second profile which is not coincident with the first profile.

Abstract: A screwdriver device for a threaded plug includes a structure which extends along an axis and includes a head and a shank connected to a first end of the head, wherein the head has a second end which opens onto a cavity suitable for containing a head of a plug, wherein along the axis the cavity includes at least a first portion having a lateral surface which has a first profile and at least a second portion having a lateral surface which has a second profile which is not coincident with the first profile.

Abstract: A threaded plug includes a structure which extends along an axis and includes a head, a body provided with an outer thread, and a clamping flange inserted between the head and the body; wherein the head includes, along the axis, at least one first portion having an outer lateral surface which features a first profile and at least one second portion having an outer lateral surface which features a second profile which is not coincident with the first profile.

Abstract: A threaded plastic plug (1) comprises a single-piece structure, having a longitudinal axis (2) of symmetry, and comprises a head (5), a body (3) with an outer thread (6) and a cylindrical collar (17b), and a tightening flange (4) interposed between the head (5) and the body (3). The head (5) has the shape of a tubular solid (8) projecting from the flange (4) in a direction parallel with the axis (2) of the plug (1), and comprises an inner cavity (7), accessible from the outside through one end of the solid (8), the cavity (7) being laterally surrounded by a non-circular surface (22) of an annular wall (9). The wall (9) of the tubular solid (8) which surrounds the cavity (7) having a variable thickness, the greater thickness being located close to the flange (4) and entirely facing towards the inside of the cavity (7). [FIG.

Abstract: A device comprises a threaded plug (1) and related screwdriver (10). The plug (1) has a single-piece structure, with a longitudinal axis (2) of symmetry, a head (5), a body (3) with an outer thread (6) and a tightening flange (4) interposed between the head (5) and the body (3). The head (5) is shaped as a tubular solid (8) projecting from the flange (4) in a direction parallel with the axis (2), and comprises an inner cavity (7), laterally surrounded by a non-circular surface (22) of an annular wall (9). The non-circular surface (22) is oblique and diverges from the axis (2) travelling from the body (3) to the head (1). The screwdriver (10) comprises a shaped head (12) equipped with surfaces (13) which can be coupled with the non-circular surface (22) with direct contact and automatic taking up of the coupling play.