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A nozzle insert for an actuator head of a fluid dispenser includes a circular body having a central portion containing a discharge orifice, and an annular, conical flange extending radially outwardly from such central portion and being radially flexible relative thereto. The insert is seated within

A nozzle insert for an actuator head of a fluid dispenser includes a circular body having a central portion containing a discharge orifice, and an annular, conical flange extending radially outwardly from such central portion and being radially flexible relative thereto. The insert is seated within a smooth, cylindrical head bore having a constant diameter, and engages a cylindrical probe on the head concentric to the bore. An end wall of the flexible, conical flange faces outwardly of the bore and presents a sharp outer peripheral edge of a diameter slightly greater than the bore diameter. And, the insert body is of a harder material than that of the actuator head, so that the conical flange defines a circular, self-locking pawl for positively locking the insert fully seated within the bore as the sharp peripheral edge penetrates into the bore wall.

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An actuator head for a fluid dispenser, the head comprising a body having an open bore and a discharge passage leading to said bore, said body being of a material of predetermined hardness and having a cylindrical probe concentric to said bore, a nozzle insert seated within said bore on said probe a

An actuator head for a fluid dispenser, the head comprising a body having an open bore and a discharge passage leading to said bore, said body being of a material of predetermined hardness and having a cylindrical probe concentric to said bore, a nozzle insert seated within said bore on said probe and defining a swirl chamber with said probe, said bore being defined by a smooth cylindrical wall of constant diameter, said insert comprising a circular body having a central portion containing a discharge orifice in communication with said swirl chamber, an annular, conical flange diverging in an outward direction of said bore and being connected to said central portion along a circular hinge line for radial flexing movement about said hinge line and without deformation upon being seated within said bore, an inner conical surface of said flange forming an acute angle with a confronting outer surface of said central portion, a terminal end wall and an outer conical surface of said flange together defining an acute angle therebetween which presents a sharp outer peripheral edge of a diameter slightly greater than said constant diameter in a relaxed condition of said flange such that said flange is caused solely by said wall of said bore to flex radially inwardly about said hinge line, without deformation, upon seating said insert within said bore, and said insert body being of a harder material than that of said head body material such that in a seated position of said insert within said bore said sharp outer edge penetrates into said head body material as said flange flexes by itself, without deformation, radially outwardly about said hinge line, said conical flange thereby defining a circular, self-locking pawl for alone positively locking and sealing said insert in said seated position within said bore, and any force applied in said outward direction of said bore tending to further penetrate said sharp edge into said body material.