A plastic needle tip shielding device to be fitted inside a catheter hub of a intravenous catheter instrument comprising: a body with a rear side, a front side, an outer surface connecting said rear side and said front side, a hole extending from said rear side to said front side, a resilient arm extending at an attachment point from said front side of said body, and a longitudinal arm; wherein said resilient arm has a resting state, from which it may be forced to yield free passage through said hole in an axial direction of said body, said resilient arm being adapted for protecting or clamping a needle tip of a needle extending through said hole, wherein said attachment point is positioned radially outwardly from said hole;and wherein any straight imaginary line extending longitudinally through said hole in the axial direction of said body coincides with said resilient arm, when said resilient arm is in said resting state, characterized in that said needle tip shielding device is a homogenous injection molded needle tip shielding device made of a molded plastic material, wherein said longitudinal arm is resilient and has a resting state, from which it may be forced to yield free passage through said hole in an axial direction of said body, and any straight imaginary line extending longitudinally through said hole in the axial direction of said body coincides with said longitudinal arm, when said longitudinal arm is in said resting state. a body with a rear side, a front side, an outer surface connecting said rear side and said front side, a hole extending from said rear side to said front side, a resilient arm extending at an attachment point from said front side of said body, and a longitudinal arm; wherein said resilient arm has a resting state, from which it may be forced to yield free passage through said hole in an axial direction of said body, said resilient arm being adapted for protecting or clamping a needle tip of a needle extending through said hole, wherein said attachment point is positioned radially outwardly from said hole;and wherein any straight imaginary line extending longitudinally through said hole in the axial direction of said body coincides with said resilient arm, when said resilient arm is in said resting state, characterized in that said needle tip shielding device is a homogenous injection molded needle tip shielding device made of a molded plastic material, wherein said resilient arm has a resting state, from which it may be forced to yield free passage through said hole in an axial direction of said body, said resilient arm being adapted for protecting or clamping a needle tip of a needle extending through said hole, wherein said attachment point is positioned radially outwardly from said hole;and wherein any straight imaginary line extending longitudinally through said hole in the axial direction of said body coincides with said resilient arm, when said resilient arm is in said resting state, characterized in that said needle tip shielding device is a homogenous injection molded needle tip shielding device made of a molded plastic material, wherein said longitudinal arm is resilient and has a resting state, from which it may be forced to yield free passage through said hole in an axial direction of said body, and any straight imaginary line extending longitudinally through said hole in the axial direction of said body coincides with said longitudinal arm, when said longitudinal arm is in said resting state.