A method of making a forceps, wherein the forceps comprises: an end effector assembly including first and second jaw members (110, 120), at least one of the jaw members (110, 120) movable relative to the other between a spaced-apart position and an approximated position for grasping tissue therebetween, the method comprising the following steps in the manufacture of at least one of the jaw members: providing an insulator including at least one engagement knob extending therefrom, the at least one engagement knob having a diameter "d"; providing a tissue-sealing plate having at least one engagement aperture defined therethrough, the tissue sealing plate defining a tissue-sealing surface; and positioning the tissue-sealing plate about the insulator such that the at least one engagement knob is inserted through the at least one engagement aperture and such that a free end of the at least one engagement knob extends through the at least one engagement aperture and extends from the tissue-sealing surface of the tissue-sealing plate, characterised in that the method further comprises deforming the free end of the at least one engagement knob such that the free end of the at least one engagement knob is deformed from a first configuration having diameter "d" which is less than a diameter of the at least one engagement aperture, to a second configuration having a diameter "D" which is greater than the diameter of the at least one engagement aperture, thereby preventing the at least one engagement knob from passing through the at least one engagement aperture and securing the insulator and the sealing plate to one another, wherein the step of deforming the free end of the at least one engagement knob is performed via heat-staking, such that in the second configuration, the free end of the at least one engagement knob protrudes a pre-determined distance from the tissue-sealing surface to set a gap distance between the jaw members (110, 120) when the jaw members (110, 120) are disposed in the approximated position. an end effector assembly including first and second jaw members (110, 120), at least one of the jaw members (110, 120) movable relative to the other between a spaced-apart position and an approximated position for grasping tissue therebetween, the method comprising the following steps in the manufacture of at least one of the jaw members: providing an insulator including at least one engagement knob extending therefrom, the at least one engagement knob having a diameter "d"; providing a tissue-sealing plate having at least one engagement aperture defined therethrough, the tissue sealing plate defining a tissue-sealing surface; and positioning the tissue-sealing plate about the insulator such that the at least one engagement knob is inserted through the at least one engagement aperture and such that a free end of the at least one engagement knob extends through the at least one engagement aperture and extends from the tissue-sealing surface of the tissue-sealing plate, characterised in that the method further comprises deforming the free end of the at least one engagement knob such that the free end of the at least one engagement knob is deformed from a first configuration having diameter "d" which is less than a diameter of the at least one engagement aperture, to a second configuration having a diameter "D" which is greater than the diameter of the at least one engagement aperture, thereby preventing the at least one engagement knob from passing through the at least one engagement aperture and securing the insulator and the sealing plate to one another, wherein the step of deforming the free end of the at least one engagement knob is performed via heat-staking, such that in the second configuration, the free end of the at least one engagement knob protrudes a pre-determined distance from the tissue-sealing surface to set a gap distance between the jaw members (110, 120) when the jaw members (110, 120) are disposed in the approximated position. providing an insulator including at least one engagement knob extending therefrom, the at least one engagement knob having a diameter "d"; providing a tissue-sealing plate having at least one engagement aperture defined therethrough, the tissue sealing plate defining a tissue-sealing surface; and positioning the tissue-sealing plate about the insulator such that the at least one engagement knob is inserted through the at least one engagement aperture and such that a free end of the at least one engagement knob extends through the at least one engagement aperture and extends from the tissue-sealing surface of the tissue-sealing plate, characterised in that the method further comprises deforming the free end of the at least one engagement knob such that the free end of the at least one engagement knob is deformed from a first configuration having diameter "d" which is less than a diameter of the at least one engagement aperture, to a second configuration having a diameter "D" which is greater than the diameter of the at least one engagement aperture, thereby preventing the at least one engagement knob from passing through the at least one engagement aperture and securing the insulator and the sealing plate to one another, wherein the step of deforming the free end of the at least one engagement knob is performed via heat-staking, such that in the second configuration, the free end of the at least one engagement knob protrudes a pre-determined distance from the tissue-sealing surface to set a gap distance between the jaw members (110, 120) when the jaw members (110, 120) are disposed in the approximated position.