Cock for creating and interrupting a fluid connection between at least two connecting parts (2, 4), comprising at least a connecting and interrupting element for creating the fluid connection and for interrupting the fluid connection, wherein the connecting and interrupting element is conical at least in sections, and has at least one through-opening for crating the fluid connection, a manual actuating element for rotating the connecting and interrupting element, said manual actuating element and said connecting and interrupting element being mechanically coupled, a main body, wherein the main body comprises at least one connecting part and an inner space for receiving the connecting and interrupting element, wherein the interior space has a contact surface for contacting the connecting and interrupting element, wherein the contact surface is formed negatively at least in sections to the conical surface portion of the connecting and interrupting element, wherein at least one spring element is provided for positively fixing the position of the connecting and interrupting element relative to the main body, the spring element being arranged in or on the main body wherein the connecting and interrupting element has an extension in its axial extension direction adjacent to the taper section with the smallest diameter, wherein the extension has a wall, in particular a wall inclined with respect to the axial direction of extension, wherein the at least one spring element contacts the wall for generating a tensile force in the connecting and interrupting element, said spring element having at least two elongated portions (50, 52), said two elongated portions (50, 52) being interconnected by a bent portion, wherein the two elongated portions (50, 52) are formed as two elongated positioning portions (56, 58) and contact the wall for generating a tensile force in the connecting and interrupting element characterized in that the spring element additionally comprises at least three elongated retaining portions (60, 62, 74), wherein the positioning portions (56, 58) forming the ends (76, 78) of the spring element, wherein each positioning portion (56, 58) is connected to a retaining portion (60, 62) via a bent portion (64, 66), wherein a central elongate retaining portion is connected by means of two bent portions (54, 55) on either side to a respective one of the further retaining portions (60, 62), wherein the retaining portions (60, 62, 74) are positively and/or frictionally coupled to the main body via retaining elements (92, 94, 96). comprising at least a connecting and interrupting element for creating the fluid connection and for interrupting the fluid connection, wherein the connecting and interrupting element is conical at least in sections, and has at least one through-opening for crating the fluid connection, a manual actuating element for rotating the connecting and interrupting element, said manual actuating element and said connecting and interrupting element being mechanically coupled, a main body, wherein the main body comprises at least one connecting part and an inner space for receiving the connecting and interrupting element, wherein the interior space has a contact surface for contacting the connecting and interrupting element, wherein the contact surface is formed negatively at least in sections to the conical surface portion of the connecting and interrupting element, wherein at least one spring element is provided for positively fixing the position of the connecting and interrupting element relative to the main body, the spring element being arranged in or on the main body wherein the connecting and interrupting element has an extension in its axial extension direction adjacent to the taper section with the smallest diameter, wherein the extension has a wall, in particular a wall inclined with respect to the axial direction of extension, wherein the at least one spring element contacts the wall for generating a tensile force in the connecting and interrupting element, said spring element having at least two elongated portions (50, 52), said two elongated portions (50, 52) being interconnected by a bent portion, wherein the two elongated portions (50, 52) are formed as two elongated positioning portions (56, 58) and contact the wall for generating a tensile force in the connecting and interrupting element characterized in that the spring element additionally comprises at least three elongated retaining portions (60, 62, 74), wherein the positioning portions (56, 58) forming the ends (76, 78) of the spring element, wherein each positioning portion (56, 58) is connected to a retaining portion (60, 62) via a bent portion (64, 66), wherein a central elongate retaining portion is connected by means of two bent portions (54, 55) on either side to a respective one of the further retaining portions (60, 62), wherein the retaining portions (60, 62, 74) are positively and/or frictionally coupled to the main body via retaining elements (92, 94, 96).