Mould for manufacturing hollow bodies made of plastic material, the mould comprising: - a first half-mould; - a second-half-mould; - a hinge on which the first half-mould and the second half-mould are mounted so as to be able to move in rotation, the mould being able to move between: - a closed position in which the first half-mould and the second half-mould are in contact with one another and define between them an imprint for moulding hollow bodies to be manufactured, and - an opening position in which the first half-mould and the second half-mould are separated from one another; the mould also comprising means for locking in the closed position, the locking means comprising: - at least one first hook having a first cavity, mounted fixedly on the first half-mould, - at least one second hook having a second cavity, mounted so as to be able to move on the second half-mould, the second hook being able to adopt: - a locking position in which the first hook and the second hook are nested one inside the other, and - an unlocked position in which the first cavity and the second cavity are separated from one another, wherein the first cavity of the first hook is oriented towards the inside of the mould, and the second cavity of the second hook is oriented towards the outside of the mould, and in that the first hook comprises a first retaining surface and the second hook has a second retaining surface, the second retaining surface facing the first retaining surface when the second hook is in the locking position, the second retaining surface defining a functional clearance (j) with the first retaining surface prior to pressurization of the moulding imprint, characterized in that the functional clearance (j) is greater than or equal to 0.05 mm and less than or equal to 0.4 mm. - a first half-mould; - a second-half-mould; - a hinge on which the first half-mould and the second half-mould are mounted so as to be able to move in rotation, the mould being able to move between: - a closed position in which the first half-mould and the second half-mould are in contact with one another and define between them an imprint for moulding hollow bodies to be manufactured, and - an opening position in which the first half-mould and the second half-mould are separated from one another; - a closed position in which the first half-mould and the second half-mould are in contact with one another and define between them an imprint for moulding hollow bodies to be manufactured, and - an opening position in which the first half-mould and the second half-mould are separated from one another; the mould also comprising means for locking in the closed position, the locking means comprising: - at least one first hook having a first cavity, mounted fixedly on the first half-mould, - at least one second hook having a second cavity, mounted so as to be able to move on the second half-mould, the second hook being able to adopt: - a locking position in which the first hook and the second hook are nested one inside the other, and - an unlocked position in which the first cavity and the second cavity are separated from one another, - at least one first hook having a first cavity, mounted fixedly on the first half-mould, - at least one second hook having a second cavity, mounted so as to be able to move on the second half-mould, the second hook being able to adopt: - a locking position in which the first hook and the second hook are nested one inside the other, and - an unlocked position in which the first cavity and the second cavity are separated from one another, wherein the first cavity of the first hook is oriented towards the inside of the mould, and the second cavity of the second hook is oriented towards the outside of the mould, and in that the first hook comprises a first retaining surface and the second hook has a second retaining surface, the second retaining surface facing the first retaining surface when the second hook is in the locking position, the second retaining surface defining a functional clearance (j) with the first retaining surface prior to pressurization of the moulding imprint, characterized in that the functional clearance (j) is greater than or equal to 0.05 mm and less than or equal to 0.4 mm.